1/4-28 12pt. Nuts (10)

ARP 1/4-28 12pt. Nuts are precision fasteners designed for high-performance engine builds and critical assembly applications. This set of 10 chromoly nuts features a 1/4-inch thread diameter with 28 threads per inch (TPI) specification, paired with a 5/16-inch 12-point head geometry. The black oxide coating provides corrosion resistance and a professional finish suitable for both cosmetic and functional engine bay work.

The 12-point head design delivers superior engagement with 12-point sockets and wrenches, reducing the risk of rounding that can occur with standard 6-point fasteners—a critical advantage when working with tight tolerances in modern engine compartments. Chromoly construction ensures strength and durability under thermal cycling and vibration stress. The 1/4-28 thread pitch is commonly used in high-performance engine applications where load capacity and reliability demand fasteners engineered beyond standard hardware store specifications.

These ARP fasteners are ideal for engine builders, performance shops, and serious enthusiasts assembling or rebuilding high-horsepower engines where bolt preload control and thread integrity matter. The 1/4-28 fastener is standard in many engine block, cylinder head, and accessory applications requiring precise torque specifications. Purchasing in a set of 10 provides convenient inventory for complete assemblies or replacement stock for ongoing projects.

ARP (Automotive Racing Products) is recognized for manufacturing fasteners to exacting standards, with each product engineered to support motorsports and high-performance applications where standard fasteners fall short. Verify thread pitch and head size compatibility with your specific application before installation to ensure correct fit and function.