Bolt Flat Head 5/16-18 x .75 Lug Dr Wide 5

The Bolt Flat Head 5/16-18 x .75 Lug Dr Wide 5 by WILWOOD is a precision-engineered fastener designed specifically for high-performance brake and suspension systems where secure, vibration-resistant clamping is essential. Ideal for custom brake setups, track car upgrades, or modified suspension assemblies, this fastener provides the necessary holding power under extreme duty cycles.

This fastener features a 5/16-18 thread pitch, a .75-inch length, and a flat head design with a wide lug drive socket, which is optimized for even load distribution across caliper mounting surfaces and brake rotor carriers. The flat head profile sits flush when installed, eliminating protrusions that could interfere with cooling airflow or catch brake dust. Additionally, the wide lug drive design enhances torque transfer compared to standard drives, reducing the risk of cam-out during installation.

Mechanics and fabricators restoring or upgrading WILWOOD brake systems will benefit from this fastener's durability under thermal cycling and vibration. At just 0.15 lbs per unit, its minimal weight won't impact vehicle dynamics, making it a reliable choice for high-performance applications.