GRADE 5 STRENGTH + CORROSION RESISTANCE
DURA-CON 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 1500 hours of Salt Spray per ASTM B-117.