7/16in Stepped Head Bolt Washers (34)

The 7/16in Stepped Head Bolt Washers (34) from B and B PERFORMANCE PRODUCTS are precision-engineered fastener components designed for high-stress aluminum head applications in motorsports, powersports, and tactical equipment builds. This bulk set of 34 washers addresses a critical need in custom assembly work where standard fasteners fall short—providing proper load distribution and vibration resistance in environments where bolt failure is not an option. Whether you're building race engines, assembling AR platforms, or servicing military-spec hardware, stepped head bolt washers prevent galling, crush injury to soft aluminum, and catastrophic fastener separation.

Each washer is manufactured from chromoly steel with a black oxide finish, delivering corrosion resistance and professional appearance while maintaining structural integrity under extreme loads. The stepped design—featuring a 0.872-inch outer diameter, 0.438-inch inner diameter, and 0.565-inch insert outer diameter—creates a precision interface that seats flush against aluminum head surfaces without deformation. At 0.150 inches thick, this washer geometry distributes clamping force across a wider surface area than flat washers, significantly reducing the risk of fastener loosening due to vibration, thermal cycling, or recoil impulse. The chromoly composition ensures these washers maintain their shape and hardness even when torqued to specification or exposed to temperature fluctuations common in engine bays and operational environments.

Technicians, gunsmiths, and engine builders benefit most from this 34-unit bulk pack—enough for multiple projects without reordering. These washers are essential for 7/16-inch head bolt applications across aluminum cylinder heads, intake manifolds, and precision equipment mounts where load concentration must be controlled. Installation requires no special tools; simply position the stepped washer under the bolt head before fastening to your torque specification. The black oxide coating provides aesthetic consistency with tactical hardware while offering baseline corrosion protection in storage and field conditions.