Keps® Nuts or K-Lock® Nuts are nuts pre-assembled with a free-spinning captive washer, usually an external tooth lock washer. As the nut is tightened, the washer bites into the mating surface, forming the locking feature of the nut.
Keps are available on the FCH Network with Imperial/US diameters that range from #1 to 6 and with Metric diameters that range from M3 to 6. The length of Keps is usually measured from the point to the underside of the head.
Keps are available on the FCH Network in materials that range from Steel to Silicon Bronze
Keps are available on the FCH Network in finishes or coatings that range from Plain to Phosphate