Carmex Threading Tap - Forming Tap (Roll) - UNF Supercut Tap - Powder Metal - 3/4 x 16The Carmex UNF Forming Tap (Roll) for 3 4 x 16 is a high performance threading tool designed for precision Unified National Fine threads. Built for professional shops and machinists, it forms threads through a forming action that delivers strong, consistent results while reducing waste. Thread format: UNF 3 4 16 standard Unified National Fine threading for a precise, strong fit in fasteners and components. Forming (Roll) design: Forms threads by