3/8-16X5/8X1/4 Coarse Thread Standard Pattern Hex Machine Screw Nut Zinc (Pack Qty 2,000) BC-37NH

Hex Machine Screw Nut: Designed to be used specifically with machine screws. Stainless nuts are used with stainless machine screws where parts are subject to corrosive conditions. Square Machine Screw Nut: Offers a greater bearing surface for wrenching Steel: Any low carbon steel. Stainless: 18-8 stainless steel