Kep locknuts

Kep locknuts are available in Stainless Steel (SS) 18-8 and Zinc.

 These fasteners have a six-sided nut body with a free-spinning, serrated K-washer permanently attached to the bearing face, designed to lock against the mating surface and resist loosening from vibration.

Also known as “K-nuts” or “washer nuts,” these fasteners combine a standard hex nut and a serrated locking washer into a single pre-assembled unit, eliminating the need for a separate washer and simplifying installation. Their six-sided body allows for easy tightening with standard wrenches and sockets, and the integrated serrated washer bites into the mating surface under clamp load to resist rotation and prevent loosening in vibration-prone assemblies.