Description

Rocker arm nuts are a critical fastening point in your valvetrain, and using OEM hardware in high-performance applications is a recipe for failure. ARP’s chromoly rocker arm nuts are engineered to withstand the extreme pressures and cyclic stress of racing and forced induction, eliminating the risk of nut creep or loosening that can lead to catastrophic engine damage. If you’re building a serious engine or upgrading a stock setup, this kit gives you the reliability and clamping force you need.

The 3/8 (16) configuration fits most aluminum rocker arm applications, making this a direct upgrade from standard fasteners. Each nut is manufactured from chromoly steel and finished in black oxide for corrosion resistance, ensuring consistent performance across multiple heat cycles and high RPM operation.

Thread: 3/8-24
Shank diameter: 0.550 in
Length: 1.200 in
Material: Chromoly steel
Finish: Black oxide
Quantity: 16 nuts
Application: Aluminum rockers
Bolt-on installation