Lock Nuts

Bearing locknuts thread onto adapter sleeves and shafts to draw bearings tight and hold them securely in place, working together with a matching lockwasher to prevent loosening under vibration. Off Road Belts stocks locknuts in popular AN and KM series across inch and metric sizes, sized to match our adapter sleeves and a wide range of bearing assemblies. Whether you’re mounting a new bearing or replacing a missing nut during a rebuild, you’ll find the right thread and size here. Shop our bearing locknuts below — pair them with the correct lockwasher — and order with fast nationwide shipping.