7/16 Neckdown Stud - 4.500 Long 3/8 Head

The ARP 7/16 Neckdown Stud – 4.500 Long with 3/8 Head is a precision-engineered fastener designed for critical engine and high-performance applications where dual-thread compatibility and reliable clamping force are essential. This neckdown stud features dual threading specifications (3/8-24 and 7/16-14) that allow it to interface with both metric and SAE components in a single assembly, eliminating the need for multiple fastener types and simplifying complex engine builds.

Manufactured from chromoly steel with black oxide coating, this ARP stud delivers the strength and corrosion resistance required in engine bay environments where thermal cycling and moisture exposure are constant concerns. The broached design ensures consistent thread engagement and eliminates stripping risk common with rolled threads. At 4.5 inches in length with a 3/8-inch head diameter, the stud accommodates standard socket and wrench engagement while maintaining the compact profile needed in tight engine compartments. Chromoly's superior tensile strength compared to standard steel ensures predictable preload retention under vibration and temperature variation.

This fastener serves engine builders, machine shops, and performance enthusiasts assembling heads, intakes, accessory brackets, and other critical components where stud preload integrity directly affects reliability. The dual-thread configuration is particularly valuable in mixed-standard assemblies where engineering constraints prevent standard fastener consolidation. Sold individually, allowing buyers to source exactly the quantity required for their specific build.

ARP studs are engineered to ARP's published specifications for preload and clamp load, setting the standard in high-performance fastening. The black oxide finish provides moderate corrosion resistance suitable for engine bay use, though additional protective measures are recommended in marine or harsh-salt environments.