YG-1 - Z6404 Z6 Series Vanadium Alloy HSS Roll Form Tap with Oil Groove, Uncoated (Bright) Finish, Round Shank with Square End, Bottoming Chamfer, 1/4"-20 Thread Size, H4 Tolerance

Kodiak Cutting Tools KCT210153 USA Made Roll/Thread Forming Tap, H3 Limit, Plug Style, High Speed Steel, TiN Coated, 8-36 Size