Union Butterfield Spiral Point Machine Tap, Relieved, Series: 1585, Measurement System: Imperial, UNC, 3/8-16, Plug Chamfer, 3 Flutes, HSS, Bright, Class of Fit: 3B, Right Hand Cutting, 1-1/4 in Thread Length, 2-15/16 in Overall Length, 0.381 in Shank Dia, Steel, Stainless Steel, Titanium, Nickel, Copper, Aluminum Magnesium and Synthetic Materials Material Application, H3 Thread Limit