NUT - NYLOCK JAM 1 1/4-12 (Bobcat BC66D20)

BC66D20: A damaged nylock jam nut can compromise threaded joint security. This aftermarket replacement part references Bobcat as the OE maker and cross-references part number BC66D20. The nut type uses a nylon insert to resist loosening from vibration. A plain mechanical function is to lock against a primary fastener to prevent rotation. A concrete generic failure consequence is that a missing or worn nut may allow the assembly to separate under load. Keeping a nylock jam nut in sound condition helps maintain clamping force in threaded connections. Verify the serial number or application, then call (562) 693-7748.

Part number variants: BC66D20, bc66d20