NUT - LOCK (CAT CT0056866)

A damaged lock nut can compromise the security of a bolted joint, leading to loosening under vibration. During assembly, a lock nut resists rotation through a built-in mechanical locking feature, such as a nylon insert or deformed threads. The part type is a hardware nut, specifically designed to prevent unintentional loosening in threaded fasteners. A common failure consequence is gradual fastener back-out, which may cause component misalignment or detachment. Keeping a lock nut in sound condition helps maintain clamping force in critical connections. This aftermarket replacement part references CAT as the OE maker and cross-references part number CT0056866. Verify the serial number or application, then call (562) 693-7748.

Part number variants: CT0056866, ct0056866