LOCKWASHER (Toyota TY0120043CCCCC)

TY0120043CCCCC: A damaged lockwasher can allow threaded fasteners to loosen under vibration. This aftermarket replacement part references Toyota catalog number TY0120043CCCCC. A lockwasher is a type of hardware washer that creates tension between a nut and the mating surface. Its plain mechanical function is to resist rotational loosening by biting into the fastener and the joint. A common failure consequence is that a worn or missing lockwasher leads to progressive fastener back-out, causing joint separation. Keeping a lockwasher in sound condition helps maintain clamp load in bolted assemblies. Verify the serial number or application, then call (562) 693-7748.

Part number variants: TY0120043CCCCC, ty0120043ccccc