4-40X1/4X3/32 Standard Pattern Hex Machine Screw Nut Black Zinc (Pack Qty 10,000) BC-04NHBZ

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