Hex Nuts - 7/16-20 (10)

ARP Hex Nuts 7/16-20 (10-pack) deliver precision fastening for high-performance engine and drivetrain applications. These chromoly hex nuts feature a 5/8-inch head and black oxide finish, engineered to withstand extreme clamping loads and vibration in demanding motorsports and heavy-duty mechanical environments. Each set contains 10 units of the exact thread specification required for critical assembly work.

The 7/16-20 thread specification indicates a 7/16-inch nominal diameter with 20 threads per inch—a standard fastener sizing found in modern engine block assembly, cylinder head applications, and performance transmission work. Chromoly construction provides superior tensile strength compared to standard steel, critical for applications where bolt preload consistency and vibration resistance are non-negotiable. The black oxide coating offers corrosion protection while maintaining precise thread engagement without the brittleness associated with heavy plating.

Technicians restoring classic performance engines, building high-horsepower domestic V8s, and assembling racing-spec transmissions rely on ARP fasteners to maintain thread integrity under sustained load and thermal cycling. The 10-count packaging covers a typical single-application job lot, reducing inventory complexity while ensuring matching chromoly nuts across critical fastening points. Users value ARP fastening systems for their consistency in torque specifications, minimal galling during installation, and predictable clamp load retention.

ARP is recognized within the motorsports fastening industry for strict manufacturing tolerances and material traceability. These hex nuts complement ARP's full line of engine fastening kits and individual studs, allowing builders to upgrade specific fastening points or replace worn hardware without replacing complete assemblies. Proper torque application with a calibrated wrench is essential to achieve the clamping force these nuts are designed to deliver.