Union Butterfield Union Butterfield Straight Flute Hand Tap, General Purpose, Series: 452, Measurement System: Metric, Coarse, M12x1.25, Plug Chamfer, 4 Flutes, HSS, Bright, Class of Fit: 6H, Right Hand Cutting, 1-21/32 in Thread Length, 3-3/8 in Overall Length, 0.367 in Shank Dia, Steel, Stainless Steel, Copper, Titanium, Nickel, Cast Iron, Aluminum Magnesium and Synthetic Materials Material Application, D6 Thread Limit