Keps nuts, also known as K-Lock nuts, are specialized fasteners that combine a standard hex nut with a permanently attached lock washer. The washer typically has external teeth that bite into the mating surface, increasing friction and preventing the nut from loosening due to vibration or dynamic loads. This design eliminates the need for a separate washer, making installation quicker and reducing the number of components in an assembly. Keps nuts are widely used in machinery, automotive, and electronic equipment assembly, where speed, reliability, and resistance to vibration are important. Their integrated design ensures secure fastening while keeping assembly efficient and cost-effective.