UNC Tap 3/8-16

The UNC Tap 3/8-16 from Allstar Performance is an essential hand tool for any serious mechanic, engine builder, or automotive enthusiast working on custom projects and repairs. This precision cutting tool is designed to create internal threads in aluminum, steel, and cast iron components—a critical operation when you're fabricating custom engine blocks, cylinder heads, intake manifolds, or restoring stripped fastener holes.

The 3/8-16 designation specifies a 3/8-inch nominal diameter with 16 threads per inch (TPI), a standard Unified National Coarse (UNC) thread form widely used across automotive applications. Allstar Performance manufactures this tap to industry-standard tolerances, ensuring consistent thread depth and engagement with corresponding 3/8-16 bolts and studs. The compact form factor makes it easy to handle and control during hand tapping operations, while the precision-ground flutes evacuate chips efficiently to prevent binding or breakage during the cutting process.

This tool is indispensable when repairing bolt holes in engine blocks, cylinder heads, water jackets, and custom fabricated aluminum brackets common in performance builds and restorations. Home machinists and professional shops alike depend on quality tools like the UNC Tap 3/8-16 for reliable performance and durability in their projects.