1/2 Head Bolt Washers

MOROSO 1/2 Head Bolt Washers are precision-engineered fastening components designed for high-performance engine builds, drivetrain assembly, and heavy-duty mechanical applications. These heat-treated chromoly washers deliver the load distribution and dimensional consistency demanded in motorsports, restoration work, and critical mechanical assemblies where fastener integrity directly impacts reliability and safety.

Each washer in this set of 30 features a 0.870-inch outer diameter, 0.500-inch inner diameter, and 0.120-inch thickness. The chromoly construction provides superior hardness and fatigue resistance compared to standard steel washers, while heat treatment ensures uniform material properties across the entire batch. Natural finish allows integration into any build aesthetic without additional finishing steps. These specifications are critical for applications requiring consistent preload distribution, vibration dampening, and load-bearing capacity under high-cycle stress—conditions typical in engine rebuilds, transmission work, and suspension assemblies.

Builders, mechanics, and performance enthusiasts rely on washers of this caliber to prevent fastener loosening, distribute clamping force evenly, and protect underlying materials from bolt-head embedment. The 30-piece format provides sufficient quantity for complete engine builds or multi-unit projects without excess inventory. MOROSO's market reputation in performance fastening components reflects engineering standards that prioritize dimensional accuracy and material consistency—factors that prove critical when tolerances are tight and failure is not an option.