Union Butterfield Union Butterfield Straight Flute Hand Tap, General Purpose, Series: DM2-CO, Measurement System: Imperial, UNF, 1-3/8-12, Plug Chamfer, 6 Flutes, HSS, Bright, Class of Fit: 2B/3B, Right Hand Cutting, 3 in Thread Length, 6-1/16 in Overall Length, 1.1 in Shank Dia, Steel, Stainless Steel, Copper, Titanium, Nickel, Cast Iron, Aluminum Magnesium and Synthetic Materials Material Application, H4 Thread Limit