Locknuts are suitable for locating bearings on cylindrical and tapered shafts, or on adapter sleeves, and for mounting and dismounting of bearings on withdrawal sleeves.

Locknuts have four or eight evenly spaced slots on the circumference. As a result, they can be tightened particularly easily with striking-face or hook wrenches. The locknuts are secured by means of tab washers or retaining brackets.