WASHER - LOCK (Yale YT21383300)

YT21383300: A damaged lock washer can allow threaded fasteners to loosen under vibration, leading to joint failure. During assembly, a lock washer's split or toothed design creates spring tension that resists rotation. Keeping a lock washer in sound condition helps maintain clamping force in bolted connections. This aftermarket replacement part references the Yale catalog number YT21383300. The washer type provides a plain mechanical function by deforming under torque to lock the fastener. A concrete generic failure consequence is that a worn or missing lock washer may cause the fastener to back out completely. Verify the serial number or application, then call (562) 693-7748.

Part number variants: YT21383300, yt21383300