Carmex Threading Tap - Forming Tap (Roll) - UNF Supercut Tap - Powder Metal - 1/2 x 20The Carmex Threading Tap is a forming tap (roll) designed for precise UNF threading in challenging materials. Built with powder metal construction and UNF Supercut geometry, it delivers reliable performance for high speed tapping in professional shops. Size and thread: 1 2 x 20 UNF forming tap for accurate Unified National Fine threads. Forming tap design: Roll forming action creates threads without cutting chips, promoting smooth engagement and