638272 Parts

This lock washer is used frequently for a number of applications on power yard equipment. The size, 5/16, is the default for many small engine housing and manifold applications. Lock washers are used with machined bolts to fasten engine blocks to the housing of the equipment being used. The compressed washer is able to handle the constant vibration of the small gasoline engine without losing the seal between the screw or bolt and the housing. Typically these lock washers only need to be replaced when they are misplaced during repairs or when the screws that attach them have to be chiseled or cut away, meaning the washers are destroyed as well. These OEM certified replacement washers have been manufactured to the same specifications as the originals they are replacing. In addition to lawn mowers, lock washers of this type and size are frequently used on blowers, lawn tractors, cultivators, snowblowers, and trimmers. Brands compatible with this type of washer are Murray, Husky, Poulan, Bolens, Yard-Man, Cub Cadet, Troy-Bilt, Yard Machines, MTD, and Ryobi.

Mandrel bearing for riding mowers and lawn tractors. Replace if spindle makes noise or blade wobbles. Ensures smooth blade rotation. Verify fit by model.

This is a small rubber or plastic cup that sits beneath a washer's leveling leg to protect the floor and reduce vibration. It helps keep the machine stable and prevents the legs from scratching or damaging the surface underneath. Replace this pad if it is cracked, compressed, or missing, which can cause the washer to vibrate excessively, walk across the floor, or make loud banging noises during the spin cycle.

Hex head screw for securing components on lawn mowers, tractors, and outdoor power equipment. Replace if missing, stripped, or damaged during maintenance.

Hex head bolt that secures components together on lawn tractors and outdoor power equipment. Replace if damaged, stripped, or missing to restore assembly.

Hex head screw for lawn tractors and outdoor power equipment. Replaces lost, stripped, or damaged hardware. 5/16-18 thread size for secure assembly.

Bell washer for lawn mowers and tractors. Installs to secure components and prevent loosening. Replace if cracked, worn, or missing for proper assembly.