XB-08559
Washer
SAF-Holland

Within heavy-truck assemblies, a flat, circular spacer distributes clamping force across a bolt joint, protecting mating surfaces from galling and premature wear. This component serves as a load-bearing shim that establishes correct spacing between parts in structural and equipment applications, helping to maintain proper alignment under dynamic road loads. When used in conjunction with other hardware, it mitigates surface damage and reduces fretting as the vehicle encounters vibrations and shocks typical of long-haul operation. Classified under VMRS 053-007-008, the part belongs to the category of basic hardware fasteners and spacers used throughout drive trains, suspensions, and chassis assemblies. Category context 42521 indicates a fastener hardware family oriented toward spacer and washer alternatives. In practical terms, it accommodates slight tolerances in hole diameters and bolt sizes, enabling consistent clamp loads and repeatable assembly torque. End users should verify compatibility with fasteners used in the target zone, ensuring the outside diameter and thickness are appropriate for the component surface and the loaded face. The item’s role is essential for preventing concentrated load, distributing stress, and extending component life in rugged, high-vibration environments.