Union Butterfield Union Butterfield Straight Flute Hand Tap, General Purpose, Series: N4001, Measurement System: Imperial, UNC, 3/4-10, Bottoming Chamfer, 4 Flutes, HSS, Bright, Class of Fit: 2B/3B, Right Hand Cutting, 2 in Thread Length, 4-1/4 in Overall Length, 0.59 in Shank Dia, Steel, Stainless Steel, Copper, Titanium, Nickel, Cast Iron, Aluminum Magnesium and Synthetic Materials Material Application, H3 Thread Limit