3/8 Stud - 5.150 Broached

The ARP 3/8 Stud - 5.150 Broached (MPN AJ5.150-1B) is a precision fastening component engineered for critical engine and drivetrain assembly applications. Designed by ARP, a leader in high-strength fastener technology, this stud serves as a reliable anchor point in performance engine builds, cylinder head installations, and high-vibration environments where standard bolts cannot guarantee consistent clamping force over extended use.

This 3/8-inch stud features a broached design and measures 5.150 inches in length, providing optimal engagement depth for applications requiring dual thread pitches (both 3/8-16 and 3/8-24 compatibility). Manufactured from chromoly steel and finished in black oxide, the stud delivers superior tensile strength and corrosion resistance compared to standard fasteners. The broached construction ensures precise thread geometry, eliminating the inconsistencies of rolled threads and guaranteeing uniform load distribution across the fastener interface—a critical factor in maintaining cylinder head sealing integrity and preventing gasket failure in high-boost or nitrous applications.

Engine builders, performance technicians, and serious enthusiasts rely on ARP studs for racing engines, forced-induction builds, and any application where fastener relaxation or fatigue failure is unacceptable. This universal stud works across domestic and import platforms where 3/8-inch fastener diameter is specified. Installation requires proper torque sequencing and the use of ARP fastener lube to achieve accurate preload values—essential for maximizing clamp load and engine reliability. Each stud is individually manufactured to ARP's exacting standards, making it an investment in long-term durability and peace of mind.