LOCKNUT - 5/16-18 (Bobcat BC91D000005B)

A damaged locknut can allow bolted connections to loosen under vibration, leading to component misalignment or failure. The Bobcat catalog reference for this aftermarket replacement part is BC91D000005B. This locknut is a 5/16-18 threaded fastener designed to resist loosening through its locking feature. Its plain mechanical function is to clamp two or more parts together by converting rotational torque into clamping force. A common generic failure consequence is that a worn locknut may not maintain torque, causing the joint to separate during operation. Keeping a locknut in sound condition helps ensure that fastened assemblies remain secure under normal working loads. Verify the serial number or application, then call (562) 693-7748.

Part number variants: BC91D000005B, bc91d000005b