AKeps nut, (also called a k-lock nut[1]orwasher nut), is a nut with an attached, free-spinning washer.
It is used to make assembly more convenient. Common washer types are star-type lock washers, conical, and flat washers.[1]
Keps is a trademark of ITW Shakeproof. The name comes from "kep" in ShaKEProof, and the "s" is because usually more than one are purchased.[2]
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