4-40 Keps (Machine Screw Hex) Nut 18-8 Stainless Steel

4-40 Keps (Machine Screw Hex) Nut 18-8 Stainless Steel . Keps nuts (also referred to as a K-nut or washer nut) come with an attached, free-spinning washer. They are used primarily to make assembly more convenient. 18-8 stainless provides a high level of corrosion resistance.