Hex Nut - 7/16-20 (1)

The ARP Hex Nut - 7/16-20 (1) is a precision fastener engineered for high-performance engine and drivetrain applications where dependable clamping force and vibration resistance are essential. Manufactured by ARP, a leader in fastener technology for motorsports and heavy-duty machinery, this single hex nut serves as a critical component in securing critical engine assemblies, cylinder heads, and transmission components. Whether you're building a race engine, restoring a classic vehicle, or servicing industrial equipment, this fastener delivers the reliability required in demanding conditions.

Engineered from premium chromoly steel and finished with black oxide coating, the Hex Nut - 7/16-20 (1) provides superior corrosion resistance and enhanced grip on corresponding bolts and studs. The 7/16-20 thread specification ensures precise engagement with matching fasteners, while the 5/8-inch hex head geometry allows optimal wrench clearance and torque application in tight engine compartments. Black oxide treatment not only protects against rust and oxidation but also reduces light reflection and provides a professional appearance consistent with quality engine builds. The chromoly construction offers excellent tensile strength and fatigue resistance, critical properties for fasteners subject to repeated thermal cycling and vibration.

Professionals and enthusiasts restoring high-performance engines, racing applications, or rebuilding critical engine systems benefit from ARP's reputation for precision and consistency. This hex nut is ideal for use with ARP studs and bolts in cylinder head assemblies, intake manifolds, and other critical fastening points where bolt preload integrity directly impacts engine performance and longevity. Proper installation with calibrated torque specifications ensures optimal clamping force and prevents both under-torquing (leading to leakage or failure) and over-torquing (causing thread damage). For best results, pair with matching ARP fasteners and apply appropriate lubricant or anti-seize compound based on your specific application requirements.