7/16 Neckdown Stud - 2.250 Long 3/8 Head

The ARP 7/16 Neckdown Stud – 2.250 Long with 3/8 Head is a precision fastener designed specifically for high-performance engine assembly. It is ideal for professional engine builders and automotive enthusiasts who require reliable fasteners that can withstand the demands of high RPM operation and boost applications.

This fastener features a neckdown design that optimizes clamping force and minimizes stress concentration at the head-to-shank transition. Constructed from ARP's proprietary materials, it ensures superior tensile strength and consistent preload retention, making it suitable for applications where precise geometry and controlled clamp loads are critical.

Builders working on small-block and mid-displacement engines will benefit from the compact design of this stud, which allows for installation in tight engine compartments. Common applications include cylinder head bolts on aluminum or iron engine blocks, where high-strength fasteners are essential for performance and reliability.