Wiseman Threading Tools Hand Tap - Second Lead Tap - +0.002 Tolerance - M6x1Wiseman Threading Tools Hand Tap Second Lead Tap, +0. 002 Tolerance, M6x1 is built for precision minded machinists who demand flawless internal threads with every pass. This hand tap is specifically engineered to cut accurate, consistent threads by hand, delivering tight fits and reliable performance in critical applications. Key features that set this hand tap apart: Second lead design for smoother cutting and faster progress in hard to reach holes.