What is a tension control bolt?

A tension control bolt, also known as a tension-controlled bolt or a TC bolt, is a type of mechanical fastener that is designed to be tightened to a specific tension. It is used in a variety of applications where the correct level of tension is critical, such as in the construction of bridges, towers, and other structures. The bolt is tightened using a torque wrench or other tool, and the tension is measured using a special device called a tension meter. The bolt is tightened until it reaches the desired tension, and then it is secured in place using a locking mechanism. This helps to ensure that the bolt remains at the correct tension and does not loosen over time.

When should tension control bolts be used?

Tension control bolts are typically used in applications where the correct level of tension is critical to the performance of the structure or the safety of the people using it. Some examples of when tension control bolts might be used include:

• In the construction of bridges, towers, and other large structures, where the bolts are used to hold various components together and help to distribute loads evenly.

• In the construction of buildings and other structures, where the bolts are used to hold together structural elements such as beams and columns.

• In the manufacturing of heavy machinery and equipment, where the bolts are used to hold together various components and ensure that they are properly aligned.

• In any application where a high level of tension is required, such as in the construction of offshore platforms or in the mining industry.

Overall, tension control bolts are used anytime it is important to maintain a specific level of tension in a bolt in order to ensure the safety and integrity of a structure or machine.

Are there any downsides to using tension control bolts?

There are a few potential downsides to using tension control bolts:

1. Cost: Tension control bolts are generally more expensive than standard bolts, as they require more precise manufacturing and are typically made from higher-grade materials.

2. Complexity: Using tension control bolts requires specialized tools and equipment, such as a torque wrench and a tension meter, and may require additional training to use correctly.

3. Installation time: Installing tension control bolts can be time-consuming, as the bolts must be tightened to the correct tension using a torque wrench or other tool, and the tension must be carefully measured using a tension meter.

4. Maintenance: Tension control bolts may require more frequent maintenance and inspection than standard bolts, as the tension must be monitored and adjusted as needed to ensure that it remains at the correct level.

Overall, while tension control bolts offer many benefits in certain applications, they may not be the most practical choice in all cases due to the additional cost and complexity involved.

If you’d like more information about tension control bolts, contact Mudge Fasteners at (800) 634-0406.

What is a carbide bit?

A carbide bit is a cutting tool made of carbide, a material that is harder and more durable than high-speed steel. Carbide bits are used in a variety of applications, including drilling, milling, and lathing. They are commonly used in the construction and manufacturing industries for cutting through hard materials such as steel, cast iron, and non-ferrous metals. Carbide bits can withstand higher temperatures and maintain their sharp edge longer than other types of bits, making them a popular choice for many applications.

What are the benefits of using carbide bits?

There are several benefits to using carbide bits:

1. Durability: Carbide is a very hard and durable material, so carbide bits tend to last longer than other types of bits. This can save you money in the long run by reducing the need for frequent bit replacements.

2. High-temperature resistance: Carbide can withstand higher temperatures than other materials, making it suitable for use in high-temperature applications.

3. Sharpness: Carbide bits stay sharp for longer periods of time, which means they can make cleaner cuts and require less frequent sharpening.

4. Versatility: Carbide bits can be used to cut a variety of materials, including steel, cast iron, and non-ferrous metals.

5. Accuracy: Carbide bits are known for their accuracy, which is important in applications that require precise cuts.

Overall, carbide bits are a popular choice for many applications because of their durability, high-temperature resistance, sharpness, versatility, and accuracy.

Are carbide bits expensive?

Carbide bits can be more expensive than other types of bits, such as high-speed steel bits. The cost of carbide bits can vary depending on factors such as the size and shape of the bit, the type of carbide used, and the manufacturer. In general, carbide bits tend to be more expensive upfront than other types of bits, but they can save you money in the long run because they last longer and require less frequent replacement. It is important to consider the total cost of ownership when deciding whether to use carbide bits, rather than just the initial purchase price.

Who should use carbide bits?

Carbide bits are suitable for a wide range of applications and can be used by anyone who needs to cut hard materials. They are commonly used in the construction and manufacturing industries, as well as in woodworking and other crafts. If you need to make precise cuts in hard materials, or if you need a bit that will last a long time without dulling, carbide bits may be a good choice for you. However, it is important to consider the specific requirements of your application before choosing a bit, as carbide may not be the best choice for every situation.

Are there any downsides to using carbide bits?

One potential downside of carbide bits is that they can be more expensive upfront than other types of bits. However, as mentioned earlier, carbide bits tend to last longer and require less frequent replacement, which can save you money in the long run. Another potential downside is that carbide is a brittle material and can break if it is subjected to too much stress. This means that carbide bits may not be suitable for applications where the bit is likely to experience sudden impacts or shock loads. It is important to use carbide bits in accordance with the manufacturer's recommendations to ensure that they last as long as possible and do not break under heavy loads.

If you’d like more information about carbide bits, contact Mudge Fasteners at (800) 634-0406.

What is a structural bolt?

A structural bolt is a type of fastener specifically designed for use in the construction industry. Structural bolts are designed to be used in tension, meaning that they are tightened in such a way that they create a clamping force that holds two or more components together. Structural bolts are typically made from a high-strength material, such as alloy steel, and are used to connect heavy load-bearing members in structures such as bridges, buildings, and other types of infrastructure. They are usually installed using a torque wrench, which allows for precise control of the clamping force applied to the bolt.

What does A325 mean in fasteners?

A325 is a type of fastener specification for structural bolts. It is a specification established by the American Society for Testing and Materials (ASTM) for medium-strength steel bolts, studs, and other fasteners. The specification covers high-strength bolts that are intended for use in structural connections. Structural bolts made to the A325 specification are made from a medium-carbon steel that has been quenched and tempered, which gives them a high level of tensile strength and resistance to fatigue. They are also designed with a specific head shape and thread configuration, which allows them to be used with a corresponding nut and washer to create a structural connection. The A325 specification is typically used in the construction industry, particularly in the United States, to specify the material and performance requirements for structural bolts.

When do A325 bolts need to be used?

A325 bolts are typically used in structural connections where high tensile strength and resistance to fatigue are required. They are often used to connect heavy load-bearing members in structures such as bridges, buildings, and other types of infrastructure. The A325 specification is generally used in the United States, and it is often specified by building codes and engineering standards for use in structural connections.

In general, A325 bolts should be used whenever high-strength structural bolts are required in a connection. They are particularly well-suited for use in applications where the bolts will be subjected to high levels of stress, such as in load-bearing connections or in connections that will be subjected to dynamic loads. They are also often used in connections where the bolts will be exposed to harsh environmental conditions, such as in outdoor structures or in marine applications.

Are there any downsides to using A325 bolts?

One potential downside of using A325 bolts is that they are more expensive than some other types of bolts. Because they are made from high-strength steel and are designed for use in structural connections, they tend to be more expensive than bolts made from lower-strength materials.

Another potential downside of A325 bolts is that they require a specific installation process. The bolts must be tightened to a specific torque value in order to achieve the required clamping force in the connection. This requires the use of a torque wrench, which can add to the cost and complexity of the installation process.

Finally, A325 bolts are not suitable for use in all applications. They are designed specifically for use in structural connections, and they may not be appropriate for use in other types of applications where different types of bolts may be more suitable.

If you’d like more information about A325 Structural Bolts, contact Mudge Fasteners at (800) 634-0406.

What type of anchors work best in concrete?

There are several types of anchors that can be used in concrete, each with its own advantages and disadvantages. Some of the most common types of anchors include:

1. Wedge anchors: These are simple and inexpensive, and they work well in solid concrete. They consist of a threaded rod with a sloping wedge on one end and a nut on the other end. When the nut is tightened, the wedge expands, creating a secure hold in the concrete.

2. Drop-in anchors: These are similar to wedge anchors, but they have a pre-expanded sleeve that is inserted into a pre-drilled hole in the concrete. When the anchor is tightened, the sleeve collapses around the rod, creating a secure hold.

3. Epoxy anchors: These are the strongest type of concrete anchor, but they require more time and effort to install. They consist of a threaded rod with a two-part epoxy resin that is mixed and applied to the rod before it is inserted into the hole. The epoxy hardens and creates a secure hold in the concrete.

4. Screw anchors: These are similar to wedge anchors, but they have a screw thread on the end rather than a sloping wedge. They are easy to install and work well in both solid and hollow concrete.

In general, wedge anchors and drop-in anchors are the most popular choices for concrete anchor applications, due to their simplicity and effectiveness. Epoxy anchors are the strongest, but they are more expensive and time-consuming to install. Screw anchors are a good choice for lighter loads and where a removable anchor is needed.

What is a concrete screw and how is it used?

A concrete screw is a type of anchor that is used to secure objects to concrete. It consists of a hardened screw with a special thread design that allows it to be easily installed into concrete without the need for pre-drilling.

Concrete screws are particularly useful in situations where it is not practical to use other types of anchors, such as when the concrete is too hard or when the object being attached needs to be easily removed or relocated. They are also a good choice when the load being supported is relatively light, as they are not as strong as some other types of anchors.

To install a concrete screw, you will need a hammer drill and a screwdriver or drill with a screwdriver bit. First, mark the location where you want to install the screw and drill a hole using the hammer drill and a masonry bit. Next, insert the concrete screw into the hole and tighten it using the screwdriver or drill. The screw should be tightened until it is seated firmly in the concrete, but be careful not to overtighten it as this can strip the thread or cause the screw to break.

Concrete screws are a convenient and effective way to secure objects to concrete and are widely used in a variety of applications, including attaching shelves, hanging cabinets, and mounting brackets.

What is an aerated concrete screw?

Aerated concrete screws, also known as light concrete screws, are a type of anchor that is specifically designed for use in aerated or lightweight concrete. Aerated concrete is a type of concrete that is made with tiny air bubbles or pores, which makes it lighter and easier to work with than standard concrete. However, it is also weaker and more prone to crushing and cracking, which can make it more difficult to anchor objects to it.

Aerated concrete screws are designed to be used in aerated concrete without crushing or cracking it. They have a special thread design that allows them to be easily screwed into the aerated concrete, while also providing a strong and secure hold.

To install an aerated concrete screw, you will need a hammer drill and a screwdriver or drill with a screwdriver bit. First, mark the location where you want to install the screw and drill a hole using the hammer drill and a masonry bit. Next, insert the aerated concrete screw into the hole and tighten it using the screwdriver or drill. The screw should be tightened until it is seated firmly in the aerated concrete, but be careful not to overtighten it as this can strip the thread or cause the screw to break.

Aerated concrete screws are a convenient and effective way to anchor objects to aerated concrete, and they are widely used in a variety of applications, including attaching shelves, hanging cabinets, and mounting brackets.

If you’d like more information about concrete anchors or concrete screws, contact Mudge Fasteners at (800) 634-0406.

What does Grade 8 mean in fasteners?

In the U.S., a Grade 8 fastener is made of medium carbon alloy steel, quenched and tempered, and has a tensile strength of at least 150,000 psi. These fasteners are designated as Grade 8 because they meet or exceed the minimum tensile strength requirements for this grade as outlined in the SAE J429 standard. Grade 8 fasteners are often used in automotive and construction applications where high strength is required. They may also be plated with a finish, such as zinc or black oxide, to improve corrosion resistance.

What are the benefits of Grade 8 fasteners?

Some benefits of using Grade 8 fasteners include:

1. High strength: With a minimum tensile strength of 150,000 psi, Grade 8 fasteners are much stronger than most other fasteners on the market. This makes them suitable for use in applications where high loads or forces are present.

2. Durability: Grade 8 fasteners are made of high-strength alloy steel and are heat-treated to make them more durable and resistant to wear and tear. This makes them suitable for use in demanding applications where they may be subjected to high levels of stress or strain.

3. Corrosion resistance: Some Grade 8 fasteners are plated with a finish, such as zinc or black oxide, to improve their corrosion resistance. This makes them suitable for use in outdoor or humid environments where corrosion may be a concern.

4. Versatility: Grade 8 fasteners are available in a wide range of sizes and styles, including bolts, screws, nuts, and washers. This makes them suitable for use in a variety of applications and allows them to be used in conjunction with other fasteners.

5. Cost-effectiveness: While Grade 8 fasteners may be more expensive than other grades of fasteners, their high strength and durability often make them a cost-effective choice in the long run. They can save money by reducing maintenance costs and downtime due to fastener failure.

In what applications are Grade 8 fasteners required?

Grade 8 fasteners are often used in applications where high strength is required. Some examples include:

1. Automotive: Grade 8 fasteners are commonly used in the automotive industry to secure engine components and other parts that are subjected to high loads or forces.

2. Construction: Grade 8 fasteners are used in construction to secure beams, columns, and other structural elements. They may also be used to fasten heavy equipment or machinery to foundations or other support structures.

3. Military: Grade 8 fasteners are used in military applications where high strength and durability are critical, such as in the construction of military vehicles and equipment.

4. Aerospace: Grade 8 fasteners are used in the aerospace industry to secure aircraft components and other parts that are subjected to high loads or forces.

5. Industrial: Grade 8 fasteners are used in a variety of industrial applications, including the manufacture of machinery, heavy equipment, and other industrial products. They may also be used in the oil and gas industry to secure pipelines and other structures.

Are there any downsides to using Grade 8 fasteners?

Some potential downsides to using Grade 8 fasteners include:

1. Cost: Grade 8 fasteners are typically more expensive than other grades of fasteners, such as Grade 2 or Grade 5. This can make them a less cost-effective option in some applications.

2. Brittleness: Grade 8 fasteners are made of high-strength alloy steel and are heat-treated to increase their strength. However, this heat-treatment process can also make them more brittle, which can increase the risk of fastener failure if they are subjected to too much stress or strain.

3. Over-tightening: It is important to tighten Grade 8 fasteners to the proper torque specification to ensure that they are secured properly. If they are overtightened, the fasteners can be damaged or even break, which can lead to fastener failure.

4. Compatibility: Grade 8 fasteners may not be compatible with all materials. For example, if they are used to fasten soft materials such as aluminum or brass, the threads may strip or the fasteners may fail due to the lack of sufficient gripping power. It is important to ensure that Grade 8 fasteners are used with materials that they are compatible with to avoid problems.

If you’d like more information about Grade 8 nuts and bolts, contact Mudge Fasteners at (800) 634-0406.

What does Grade 5 mean in fasteners?

In the context of fasteners, such as screws, bolts, and nuts, "grade 5" refers to the strength of the material used to make the fastener. Grade 5 fasteners are made from medium carbon steel and are heat treated to increase their strength. They are stronger than grade 2 fasteners, but not as strong as grade 8 fasteners. Grade 5 fasteners are commonly used in automotive and construction applications where a higher level of strength is required. They are also sometimes referred to as "heat-treated medium carbon steel" or "medium strength" fasteners.

What are the benefits of using Grade 5 fasteners?

Some benefits of using grade 5 fasteners include:

1. Increased strength: Grade 5 fasteners are made from medium carbon steel and are heat treated to increase their strength, making them suitable for use in applications where a higher level of strength is required.

2. Durability: Grade 5 fasteners are resistant to wear and tear, making them suitable for use in applications where the fasteners will be subjected to repeated loading and unloading.

3. Corrosion resistance: Grade 5 fasteners are coated with a protective finish to help prevent corrosion, making them suitable for use in outdoor or high-moisture environments.

4. Good price-to-strength ratio: Grade 5 fasteners offer a good balance between strength and cost, making them a popular choice in a wide range of applications.

5. Wide availability: Grade 5 fasteners are widely available and can be found at most hardware stores or online retailers.

Are there any possible downsides to using Grade 5 fasteners?

There are a few potential downsides to using grade 5 fasteners:

1. They may not be strong enough for some applications: While grade 5 fasteners are strong, they may not be suitable for use in applications where extremely high levels of strength are required. In these cases, a higher grade fastener, such as a grade 8 fastener, may be necessary.

2. They may be more prone to corrosion: While grade 5 fasteners are coated with a protective finish to help prevent corrosion, they may still be more prone to corrosion than some other grades of fasteners. This can be an issue in applications where corrosion resistance is critical.

3. They may be more expensive than lower grade fasteners: Grade 5 fasteners may be more expensive than lower grade fasteners, such as grade 2 fasteners. This can be an issue in applications where cost is a major consideration.

4. They may be harder to work with: Grade 5 fasteners may be harder to work with than lower grade fasteners due to their increased strength and hardness. This can make them more difficult to cut, drill, or tap, for example.

Overall, the suitability of grade 5 fasteners will depend on the specific requirements of the application. It is important to carefully consider the strength, corrosion resistance, cost, and workability of the fasteners to ensure that they are suitable for the intended use.

If you’d like more information about Grade 5 nuts and bolts, contact Mudge Fasteners at (800) 634-0406.

It’s been a while since we launched the Power Swap chart, where we showed customers which Powers Fasteners could be substituted for more expensive Hilti parts but still get the same performance.

Since that time, DeWALT acquired Powers, and has integrated the Powers line into their existing selection of anchors, both mechanical and chemical. From expansion anchors and screw anchors for cracked concrete, to light and medium duty anchors, to high strength adhesive anchoring systems, DeWALT has something for all trades and all applications.

View the chart below to help choose the DeWALT anchor that’s best for your application. Better yet, download the PDF version, print it out and hang it in your office for quick reference at any time.

View fullsize

As always, if you have any questions about DeWALT anchors or would like to request pricing, contact the helpful team at Mudge Fasteners by calling (800) 634-0406.

*Mudge Fasteners is not a licensed engineering company, and suggestions shown in the chart are only possible use cases. Always contract a licensed engineer to evaluate any fastener substitutions before use.

Lindapter’s technical support team worked with the client in order to design a suitable connection using Hollo-Bolt, the original expansion bolt for structural steel that requires access to only one side of the HSS. The design incorporated splice connections with pre-drilled holes in the HSS which the Hollo-Bolt could be inserted through to join the roof framework together. Hollo-Bolt Countersunk and Flush Fit head types were specified in critical locations to prevent the heads obstructing the solar panels whilst Hexagonal head Hollo-Bolts were used in less critical locations in the roof framework. A Sheraplex coating was also specified for the Hollo-Bolts to provide a high level of corrosion protection.

The hollow structural sections were manufactured in a fabrication shop where they were cut to length, and holes drilled to suit the requirements of the Hollo-Bolts. The HSS was also galvanized prior to delivery to reduce labor costs and time in the field whilst also ensuring long lasting corrosion protection. Once in the field each finished and coated part was assembled by simply inserting the Hollo-Bolts into the predrilled holes and tightening them with a wrench to the recommended tightening torque. To complete the installation, solar panels were connected to the framework and then the whole roof hoisted into position on steel support columns.

For more information on Hollo-Bolt and other EV Charging fasteners, contact us at (800) 634-0406.

Mudge is pleased to announce that ELCO products are coming back into stock in our warehouse and at FastenerExpert.us.

AGGRE-GATOR
Threaded concrete anchor with the corrosion resistance of 300 series stainless.
Buy online →

ALUMI-FLEX
For fastening to aluminum when corrosion is a primary concern.
Buy online →

BI-FLEX
300 series stainless steel bi-metal self-drilling screws for greater performance.
Buy online →

DRIL-FLEX
Precision-engineered and dual heat treated structural drill screws.
Buy online →

DRILIT
Standard self-drilling fasteners in the most popular sizes.
Buy online →

TAP-FLEX
Increased thread engagement with strength and ductility.
Buy online →

Contact us for pricing and availability or shop online.

As the leader in solar panel mounting hardware and solar racking fasteners; Mudge Fasteners is always looking for the newest and best products to offer our customers. While there are always new products coming to market, the following list of products are top of the line stalwarts that every solar professional should be familiar with.

HellermannTyton creates industry-leading, solar-specific solutions - from the most reliable edge clips to the longest lasting cable ties and identification products - that bring safety, reliability and longevity to PV systems.

EJOT offers high quality, secure, easy-to-install fastening systems for rooftop PV installations, including specialty systems for solar installations on an array of roof types.

HellermannTyton Panel Clip

S-5! Hardware

S-5! is an industry leader in standing seam metal roofing attachment, creating the most sustainable roof system available, all without compromising the roof manufacturer's warranty!

DURA-CON® Corrosion Resistant Fasteners are the only fasteners specifically tested for use in solar racking materials. DURA-CON® Fasteners show resistance to Environmental Corrosion equal to that of stainless steel fasteners when tested in aluminum solar panel racking.

Titebond® WeatherMaster™ ULTIMATE MP Sealant expands and contracts due to temperature changes without cracking, and performs far better than silicone, tripolymer and urethane sealants in solar panel installations.

Elco's Flex Technology incorporates high performance and virtual immunity to embrittlement failures. Using special alloys, proprietary heat treatments and tempering processes to surpass any standard fasteners.

Titebond sealant

Staubli connectors

Roost Systems provides a complete support system for all commercial and industrial rooftop solar installations.

Staubli is a leading provider of electrical connectors, offering innovative products for the most demanding solar applications, with MC4 connectors and assembly tools to help get the job done right.

For more information about these solar fasteners or any other solar panel mounting hardware, contact the Solar Fasteners Experts at Mudge Fasteners by calling (800) 634-0406.

Vibration can make ordinary fasteners loosen and back out, whether that vibration comes from inside or outside a building. Fab-Lok fasteners from Elco combine a screw and a slotted aluminum sleeve to provide resistance to loosening in high-stress and high-vibration environments.

Elco Fab-Lok fasteners are excellent for use with insulated metal panels, featuring a hex washer head machine screw assembled to a sleeve and EPDM sealing washer. Once tightened, the clamping tines remain in place no matter if the screw remains in place or is removed. This creates greater joint integrity with clamping force and it can be used in blind applications.

Elco Fab-Loks are available in grip ranges from .062 to .750 for maximum penetrating lengths of 1.300” to 1.800”. If you want to learn more about Elco Fab-Lok fasteners or any Elco products, contact Mudge Fasteners at (800) 634-0406 for pricing and information.

When installing solar panel racking, EJOT has won the trust of small and large solar installers alike, due to their innovative designs and exceptional quality. If you’re considering using EJOT fasteners to install your PV array, there are many factors to consider. By answering the following questions, you can be sure to get the right EJOT solar fastener, in the right quantities, for your unique circumstances.

The first question to consider when choosing an EJOT solar fastener is whether the substructure is steel or wood. If the substructure is steel, the shape and thickness of the steel will be important to note. If the substructure is wood, you’ll need to determine the width and height of the purlins.

The next consideration will be the roof covering type where you plan to install your solar array. If you have a fiber cement roof profile, the profile height of the corrugate sheets should be noted. For a sandwich element or trapezoidal roof structure, you’ll need to note the depth of the ridges, as well as the manufacturer and part name or number (if available).

The last major piece of information needed to determine which solar fastener from EJOT that you’ll want to use is the length of the stud bolt required to mate with the substructure from the top of the roof covering. If this dimension varies, all lengths should be noted.

Other information that can prove helpful, but is not necessarily required, is the building size, roof slope, attic height, type of building and the location of the building, so as to determine the wind load zone and terrain category. Any information related to the PV module and rail system, such as weight, length and distance between rows may be useful in determining the correct EJOT solar fastener to select.

For a reference sheet showing all of these items and more, download the EJOT solar questionnaire. If you’d like assistance with selecting the correct EJOT solar fastener, contact Mudge Fasteners at (800) 634-0406 to speak to one of our Solar Fastener Experts.

Almost everyone in a construction trade that uses fasteners is familiar with the Elco brand name. While most contractors know some of Elco’s more popular items like Bi-Flex and Dril-Flex screws, a lesser known but equally respected product from Elco is their line of TapFast fasteners.

Elco TapFast screws are high-performing fasteners specifically designed to attach lightweight metal panels to wooden framed structures. These screws feature aluminum EPDM bonded sealing washers provide a weather-tight seal, as well as high-low threads that increase performance. The Type 17 point easily penetrates multiple panel thicknesses, and all TapFast fasteners are coated with a Stalgard finish to prevent red rust or other base metal corrosion on significant surfaces.

Elco TapFast screws have a #10 diameter, with lengths ranging from 1” to 3”. To learn more about these innovative fasteners, contact Mudge Fasteners at (800) 634-0406 for pricing and information.

Strong-Point is a trusted brand amongst construction professionals, and their line consists of a variety of high quality fasteners that are great for specialized, trade-specific applications, as well as fasteners that can be used more generally. We’re going to explore five Strong-Point brand fasteners that every construction professional should be familiar with.

Strong Point Self-Drilling Screws can be used to attach metal to metal or wood to metal with confidence. The most popular version are hex washer head, but they also offer many other head types with several drive options. These self-drillers have ICC-ES reports, and some are coated with Strong-Point’s proprietary Strong-Shield coating.

Strong Point Strongcon concrete screws are used to attach wood or metal to concrete, brick or cement block, and have Miami-Dade approval. They are offered in hex washer head or flat head. Strongcon screws have sharp threads require less torque during installation, and their diamond point design cuts and clears debris during installation for better thread engagement.

Strong Point Needle Point sheet metal screws are used to attach light gauge sheet metal to metal, are zinc-plated with a hex washer head, and feature optional white paint on the head or a bonded sealing washer under the hex washer head. Strong-Point Razor fasteners are a subfamily to the Needle Point line, with with a fine thread pitch and non-walking point.

Strong Point Polegripper fasteners are used to attach metal to wood in roofing and siding applications. The Polegripper’s Hi-Hex washer head provides excellent driving stability, and their Type ‘17’ point eliminates wood splitting during installation. Many Polegripper sizes are available in 304 stainless steel, and all are coated with Strong Shield.

Strong Point Woodworking screws are cabinetry, furniture, trim and hinge screws that are used to attach wood to wood in a wide variety of woodworking applications. Strong Point’s woodworking screws come in plain, zinc, black oxide or phosphate finishes, and are available in lengths ranging from 1/2” to 3”.

If you’d like more information or pricing on these fasteners or any other Strong Point products, contact Mudge Fasteners at (800) 634-0406 today.

Elco Fasteners has drawn on 30 years of experience in manufacturing construction fasteners to create Tap-Flex thread-forming structural screws. These fasteners are dual heat treated, self-tapping screws that provide the strength, ductility, and embrittlement failure resistance that’s crucial for curtain wall and dissimilar metal applications. Tap-Flex fasteners have been designed and engineered to substitute for bolt and nut assemblies or Taptite® screws that are often used in the construction of large building.

Tap-Flex screws feature the patent-pending E-Form® segmented thread profile that gives the fastener its thread-forming ability. The E-Form design improves in-place performance and in ease of installation by:

• Decreasing thread-forming torque, which helps to ease starting and placement

• Overcoming friction build-up to reduce drive torque

• Increasing thread engagement, helping to resist back-out and loosening activity that is caused by thermal changes or vibration

As with most of Elco’s product line, Tap-Flex screws undergo the Flex Technology dual hardening process that is unique to Elco fasteners. Flex Technology eases installation by selectively hardening lead tapping threads to a minimum of HRC 52, while the load-bearing part of the fastener is kept below the critical HRC 34 level. Due to the reduced hardness level this provides, Flex Technology fasteners also meet Grade 5 ASTM A449 standards for strength and ductility. The result is an increased ability to resist embrittlement and other structural failures, providing top-notch performance over a fastener’s lengthy life in the field.

If you’d like more information about Elco Tap-Flex thread-forming screws, or any of Elco’s Flex Technology products, contact Mudge Fasteners at (800) 634-0406 to learn more.

When installing fasteners in any outdoor environment, a primary consideration needs to be how the fasteners will be engineered for corrosion resistance. This is an even more important question in the case of very wet or extreme conditions, such as in coastal environments or geographies where rainfall and snow is heavy. The traditional approach to these situations was to encourage the use of stainless steel fasteners, but a variety of coatings and treatments are changing that perception, often offering added strength and cost savings while retaining the corrosion resistance of stainless.

DURA-CON Corrosion Resistant Fasteners employ a three layer coating system that consists of an inorganic zinc-rich first coat and an aluminum-rich organic second coat. Friction modifiers are integrated into the topcoat, resulting in repeatable torque tension characteristics during assembly. Grade 5 bolts are stronger than A307 zinc, hot dip galvanized or 300 series stainless steel bolts. DURA-CON coating provides superior corrosion resistance; withstanding 1,500 hours of Salt Spray per ASTM B-117, at a cost significantly lower than stainless steel fasteners.

Strong-Point Fasteners has a new coating called Strong Shield, which they claim to be 50% less expensive than stainless steel and more than 40 times more corrosion resistant than zinc. Strong Shield consists of four layers: a metallic zinc layer, a hex-chromium passivation, a layer of functional nano coating used as a sealer, and a high-grade anti-corrosion chemical conversion film. These fasteners can withstand 1,000 hours of Salt Spray - not as high as DURA-CON Fasteners but still very good for corrosive environments.

Many products from Elco Fasteners are coated with Stalgard, an environmentally friendly corrosion resistant finish that’s free from chromates and silicates and any processes, such as electroplating, that might induce hydrogen embrittlement or structural failures. While fasteners coated in Stalgard max out at 1,000 salt spray hours as well, this coating comes in a variety of colors, making them a good choice where particular aesthetics or needs for identification come into play.

So, has stainless steel met its match? The answer depends on what features of a fastener are most important to you, and what specifications you’re trying to meet. If you’re looking for an alternate to stainless steel fasteners, contact Mudge Fasteners at (800) 634-0406 to get the information you need.

With increasing strain on supply levels for some popular name brand fasteners like Elco’s Dril-Flex screws, many of our customers are looking for alternate options. In the case of structural drill screws, Mudge is pleased to offer new Grade 5 self-drilling screws as an alternate that are made right here in America.

These low-cost alternative drill screws are made from alloy steel that has been heat treated to Grade 5 specifications, with a higher hardness on the drill point and lead threads. Additionally, these Grade 5 screws are also coated with a proprietary corrosion resistant coating that has been tested up to 1,000 salt spray hours. The result is a drill screw that provides quick, positive drilling while preventing “head popping” brittle failures.

The new Grade 5 USA-made drill screws are stocked in two sizes; 12-14 x 1-1/2” and 1/4-14 x 2". With a minimum order of 25,000, many more sizes and variations can be ordered, including hex washer heads or phillips undercut flat heads, #10 to 1/4” diameters, #3-#5 self-drilling points, and Type B self-tapping or UNC thread types.

For more information on these domestic Grade 5 structural drill screws or any other self-drilling screws, contact Mudge Fasteners at (800) 634-0406.

During the 1980s, the United States witnessed a number of high profile fastener failures, often resulting in injury to their users. The Congressional Subcommittee on Oversight and Investigations subsequently conducted an investigation that uncovered egregious shortcomings in the fastener industry’s standards, quality controls, and general safety monitoring. The investigation also found that many international fastener manufacturers were supplying counterfeit safety certificates and presenting cheap parts as higher quality.

The Fastener Quality Act was signed into law on November 16, 1990, with the goal of protecting the public through three steps:

1. Requiring that certain fasteners sold in commerce conform to the specifications to which they are represented to be manufactured

2. Providing for accreditation of laboratories engaged in fastener testing

3. Requiring inspection, testing and certification in accordance with standardized methods.

Fasteners covered by the FQA are limited to metallic bolts, nuts, screws, studs and through-hardened direct tension-indicating washers that are manufactured to standards and specifications of consensus standards organizations or government agencies that require a grade mark. This leaves room for many exemptions, including fasteners used in an assembly and fasteners that are ordered as spare or substitute parts.

While the Fastener Quality Act has been amended three times, as recently as 1999, there are still questions as to how useful or enforceable it is with so many possible exemptions built in.

If you have questions regarding which fasteners do or don’t conform to the FQA, or need to make sure you’re buying fasteners that properly conform, contact Mudge Fasteners at (800) 634-0406.

At Mudge Fasteners, requests for material certs are common and we’re almost always able to provide the certification our customers need in a timely fashion. If a product or project you’re working on needs material certs for the fasteners used, we’re here to help.

Typically, when a cert is requested, a customer is in need of a certified Material Test Report (MTR) that contains the information required by the Fastener Quality Act. It’s important to note that the Fastener Quality Act only requires lot-level certs for heat treated and grade marked fasteners, which only covers a portion of fasteners on the market.

Material certs should always be requested at the time the order is placed, and depending on the cert and the manufacturer, the cost to supply these certs will vary. The most certs requested most often for fasteners are:

• Certificate of Conformance/Compliance (CofC): This cert is a simple statement that the referenced fastener meets all customer and/or industry specifications. The CofC is not required to report any actual dimensions or other physical properties.

• Material Test Report (MTR): Also known as a test report, inspection report or chem-phys report, this cert lists the physical properties of the fasteners without needing to report dimensions.

• Plating Cert: A cert that lists the type and thickness of plating used on the fastener, as well as the color of the chromate used.

• Initial Sample Inspection Report (ISIR): An ISIR is usually only used the first time a particular fastener is supplied to a customer, and it provides the physical properties as well as dimensions of the fastener in question. This cert may require lab testing, but once complete does not restrict the ability to have the part fabricated by different manufacturers, so long as they all meet the criteria laid out in this document.

• Production Part Approval Process (PPAP): Commonly used in the automotive industry, the PPAP is considered the most stringent cert type available. There are five levels of PPAPs available, and they all must demonstrate that the machinery used to make the fasteners are able to meet specification requirements. Some industries are beginning to use PPAPs in lieu of ISIRs.

• DFARS Compliance: The Defense Federal Acquisition Regulations Supplement (DFARS) and the Berry Amendment require that parts meeting this certification meet the criteria for "Preference for domestic specialty metals". These may be required if you’re working on defense projects and products.

• R.E.A.C.H. Compliance: This cert demonstrates that materials used in the production process do not exist in an amount higher than the recommended quantities. It relates to a regulation of the EU designed to improve the protection of human health and the environment from the risks that can be posed by chemicals.

• RoHS Compliance: RoHS compliant fasteners have chemicals like lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyl (PBB) and polybrominated diphenyl (PBDE) within the range of allowable levels.

If you need material certs for your fasteners, we can get you what you need. Contact Mudge Fasteners at (800) 634-0406 to learn more.

Mudge Fasteners has had the privilege of producing a variety of custom fasteners for a wide range of customers in many different industries. Custom fasteners can add value to your product by making it more proprietary, or they can be used for an often repeated process in the field to save time.

In order to design a custom fastener, three primary considerations need to be made: the print, the quantity desired, and the length of production lead times.

The first step in getting a custom fastener fabricated is to provide a print, or CAD drawing, containing the pertinent information about the fastener:

• Diameter

• Thread pitch

• Length

• Material

• Finish

If you do not have someone who can design in CAD programs on staff, you can typically outsource this work pretty easily, with many talented technicians both in the US and overseas offering their services at an affordable rate.

Once you have your print, you’ll want to consider the quantities you need to order. If you’re producing a product, a good general rule of thumb is order a year’s worth of product at a time. Since you’ll have significantly longer lead times when trying to restock custom parts than you would for standard parts, you have to stay ahead of inventory needs and order a little more than you think you’ll need at first glance.

The last consideration when ordering custom fasteners is the length of the lead time from the time the order is placed to when you’ll receive your parts. Depending on what country your custom part is being manufactured in, you may have to wait anywhere from eight weeks all the way up to six months to receive what you ordered. This is another reason you’ll need to really focus on inventory control… when you need to replenish your stock it’s not as easy as buying from your local Mudge distribution warehouse.

If you have questions about how to design and order a custom fastener, contact Mudge Fasteners at (800) 634-0406. We have over 100 years of combined experience in our sourcing team, and we can use our expertise to help you get exactly what you need when it comes to custom fasteners.