FAG KM12

FAG KM12 Lock Nut for Bearing Mounting Description The FAG KM12 is a metric lock nut, also known as a shaft nut or bearing nut, designed for securing bearings onto a shaft. It features four slots on its outer circumference for use with a hook or impact spanner. This precision component prevents the axial loosening of bearings and other machine parts, ensuring operational safety and reliability. It is designed to be used with an MB12 lock washer for secure fastening. Specifications Manufacturer: FAG Model: KM12 Thread Size: M60x2 Outside Diameter (d2): 80 mm Width (b): 11 mm Material: Steel Compatible Lock Washer: MB12 Label Info Brand: FAG Part Number: KM12 EAN: 4012801174336 Application This lock nut is widely used in mechanical engineering and power transmission applications, including gearboxes, electric motors, pumps, and conveyor systems, to securely locate bearings on a shaft. Country of Origin This product is made in Taiwan. CO2 Impact Choosing this surplus component over a new one prevents the emission of approximately 0.32 kg of CO2, which is comparable to the savings from driving a standard car for 1.6 kilometers. Availability This item is in stock and ready for immediate dispatch. Order now from profideals for expert support and fast delivery. FAQ What is the correct tightening procedure for a KM12 lock nut?The KM12 should be tightened using a designated hook spanner (C-spanner) to the manufacturer’s recommended torque. Once tightened, a tab on the corresponding MB12 lock washer is bent into one of the four slots on the nut to prevent it from loosening. Is the FAG KM12 interchangeable with an SKF KM 12?Yes, FAG and SKF lock nuts with the same designation (e.g., KM12) are manufactured to the same ISO 2982-2 standards. They are dimensionally identical and fully interchangeable in most applications. Can this lock nut and its washer be reused?While the nut itself can sometimes be reused if it’s in good condition, it is strongly recommended to always use a new lock washer (MB12) for each installation. The washer’s locking tab is designed for a single use to ensure a secure connection. profideals is not an authorized distributor, reseller, or representative of the products featured on this website. All product names, trademarks, brands, and logos used on this site are the property of their respective owners. Last Update: Friday, March 13, 2026