WASHER - LOCK (Nissan NI22903)

A damaged lock washer can allow threaded fasteners to loosen under vibration, leading to component separation or misalignment. During assembly, a lock washer resists rotational loosening by creating tension between the fastener head and the mating surface. Keeping a lock washer in sound condition helps maintain clamping force in bolted joints. This aftermarket replacement part references the Nissan catalog number NI22903. The part type is a hardware washer, specifically a lock washer, which provides a plain mechanical function of preventing fastener back-out. A concrete generic failure consequence is that a missing or worn lock washer may result in a joint that gradually loosens over time. Verify the serial number or application, then call (562) 693-7748.

Part number variants: NI22903, ni22903