To complete your set up check out our Complete Grade 8 Coarse Thread Fastener Shop Setup and our KM-USA High Head Cap Screw Assortment.

Complete your Assembly with our nuts and washers:

• 34-3805 - 5/16"-18 Hex Nuts - 100 Pack
• 34-4805 - 5/16"-18 Ultra-Lock Nuts - 50 Pack
• 34-8405 - 5/16"-18 Nylon Insert Lock Nuts - 50 Pack
• 37-3805 - 5/16" USS Pattern Alloy Steel Flat Washer - 100 Pack
• 37-3905 - 5/16" SAE Pattern Alloy Steel Flat Washer - 100 Pack
• 37-4805 - 5/16" Alloy Steel Split Lock Washers - 100 Pack

• 100% made in the U.S.A. from raw material melted and rolled in the U.S.A.
• 100% lot traceability back to raw material.
• 20% higher head provides increased wrenchability.
• Special high strength chrome alloy steel.
• 30° head point provides easier alignment in a threaded hole or with a hex nut.
• Roll formed threads with 60° flank angle provide superior fatigue resistance.
• UN Class 2A formed thread fit; post plating is considered Class 3A per ASME B1.1-2003 (R2008) and provides enhanced thread engagement.
• RoHS Compliant Zinc-Yellow Trivalent Plated.
• Tensile strength 150,000 P.S.I. minimum.

Please note that supply chain shortages may require us to temporarily substitute some nondomestic products, including in assortments.