WASHER - LOCK - 5/16 STEEL (Hyster HY0290798)

A damaged lock washer can allow threaded fasteners to loosen under vibration, leading to mechanical misalignment or component separation. The Hyster catalog reference for this part is HY0290798, an aftermarket replacement lock washer. This hardware washer type uses a split or toothed design to create tension between the fastener head and the mating surface. A common failure consequence is that a loose fastener may cause gradual wear or sudden detachment of attached parts. In a typical usage context, this washer is installed during reassembly of bolted joints to maintain clamping force. The washer is made of steel and has a 5/16-inch nominal size. Verify the serial number or application, then call (562) 693-7748.

Part number variants: HY0290798, hy0290798