3/8-16 Stud 1.250 Long Broached

The ARP 3/8-16 Stud 1.250 Long Broached (MPN AJ1.250-5B) is a precision fastener designed for high-performance engine assembly and critical mechanical applications where reliability under load is essential. This fastener is ideal for engine builders, race mechanics, and powersports technicians who require dependable components for competition or high-output engines.

Constructed from chromoly steel and finished in black oxide, this broached stud offers the tensile strength and corrosion resistance necessary for demanding environments such as motorsports and industrial applications. The 3/8-16 thread specification ensures compatibility with common fastening applications, while the 1.250-inch length is designed for optimal thread engagement in engine blocks and cylinder heads.

ARP's advanced broaching process guarantees precise internal geometry, which enhances clamping force distribution and minimizes fastener relaxation. This stud is recognized as the industry standard in drag racing, road racing, and performance marine applications, where traditional fasteners may fail under sustained power and vibration.