Carmex Threading Tap - Spiral Point - UNF Supercut Tap - HSS-E - 1/2 x 20The Carmex UNF Supercut Spiral Point Tap is a precision threading tool designed for professionals who demand clean UNF threads and rapid cycle times. Crafted from cobalt enriched HSS E, it maintains cutting edge at high speeds and handles demanding materials with consistent performance from the first cut. Thread Size and Type: 1 2 x 20 UNF threading tap designed for Unified National Fine holes. Cutting Design: Spiral Point (gun tap) geometry that