NUT - TOP LOCK 3/8-16 (Bobcat BC91D-6)

A damaged top lock nut can allow threaded fasteners to loosen under vibration, leading to mechanical misalignment or component separation. During assembly, a top lock nut of this type uses a built-in locking feature to resist backing off without additional hardware. The nut’s plain mechanical function is to secure a bolt or stud by creating friction against the threads. A concrete failure consequence is that a worn or stripped nut may fail to hold torque, causing the joint to loosen over time. Keeping a top lock nut in sound condition helps maintain consistent clamping force in bolted connections. This aftermarket replacement part references Bobcat catalog number BC91D-6. Verify the serial number or application, then call (562) 693-7748.

Part number variants: BC91D-6, bc91d-6, BC91D6, bc91d6