LOCKNUT - NYLON (Yale YT220165573)

A worn locknut can lead to loosening of threaded fasteners under vibration. The locknut type uses a nylon insert to create friction against the bolt threads, resisting self-loosening. This aftermarket replacement part references the Yale catalog number YT220165573. A common failure consequence is gradual fastener back-out, which may allow connected components to shift or separate. During service, a locknut that spins freely on the bolt without resistance indicates the nylon insert has degraded. Verify the serial number or application, then call (562) 693-7748. The part is a nylon-insert locknut, a hardware nut category item.

Part number variants: YT220165573, yt220165573