WASHER - LOCK (Yale YT213837)

YT213837: A damaged lock washer can lead to fastener loosening under vibration. During assembly, a lock washer resists rotational loosening by embedding its edges into the mating surface. The catalog reference is Yale part number YT213837, offered as an aftermarket replacement. This hardware washer type provides a plain mechanical function of increasing friction between the fastener head and the joint. A common failure consequence is that a missing or worn lock washer allows the nut or bolt to back off over time. Keeping a lock washer in sound condition helps maintain clamp load in bolted joints. Verify the serial number or application, then call (562) 693-7748.

Part number variants: YT213837, yt213837