Carb Hold Down Nuts 5/16in-24 Thread 4pk

The Carb Hold Down Nuts 5/16in-24 Thread 4pk from ALLSTAR PERFORMANCE (SKU ALL 26326) are precision fasteners engineered for carburetor mounting applications on high-performance and street engines. These nuts secure the carburetor base plate to the intake manifold with reliable clamping force, preventing vibration-induced loosening during aggressive acceleration, engine knock, and sustained RPM cycling. Built for engine builders, mechanics, and restoration enthusiasts who demand OEM-quality hardware that won't back off under real-world operating conditions.

Each nut features a 5/16-inch 24 threads-per-inch (TPI) thread specification, matching standard carburetor stud patterns found on Holley, Edelbrock, Quick Fuel, and other popular carburetors. The black anodized aluminum construction provides corrosion resistance and thermal stability while keeping weight minimal—critical when tuning engine bay inertia for competition or street applications. The 1/4-inch square ratchet drive allows for controlled torque application using a 3/8-inch drive ratchet or torque wrench, ensuring consistent clamping pressure without stripping or over-tightening the soft aluminum studs common to most carburetors.

Mechanics and engine builders benefit from the four-pack configuration, providing spares for multiple carburetor installs or replacements without additional ordering. Use these hold-down nuts whenever rebuilding carburetors, swapping fuel systems during engine bay restorations, or addressing stripped threads on existing fasteners. Compatible with virtually all four-barrel carburetors using 5/16-24 studs, these nuts deliver the precision and durability expected in modern engine building standards. Torque to manufacturer specifications (typically 15–25 ft-lbs) for optimal sealing and retention without carburetor distortion.