KM Locking Nuts are often referred to as bearing nuts, shaft nuts of withdrawal nuts.They are commonly used in conjunction with suitable tab washers to securely locate bearings and other components onto a shaft. They can also be utilised when mounting taper bore bearings onto shafts.KM Locking Nuts have four equally spaced slots machined into the outer diameter of the nut, enabling the nut to be secured into position using the appropriate tab washer by bending the tab into the slots.

To meet the variances of some nations using metric dimensions and to bring the quality of manufacture to United States standards, this series is manufactured with a thread of 4H tolerance grade and position as promulgated by the International Standards Organization. Still these locknuts are fully interchangeable with metric locknuts made to a 5H tolerance grade and position. Be aware, however, there are special thread metric retaining locknuts just as there have been and their will be special inch locknuts for the special engineer and special application.