Union Butterfield® Straight Flute Hand Tap, General Purpose, Series: 1500, Measurement System: Imperial, UNF, 1-12, Tapered Chamfer, 4 Flutes, HSS, Bright, Class of Fit: 2B/3B, Right Hand Cutting, 2-1/2 in Thread Length, 5-1/8 in Overall Length, 0.8 in Shank Dia, Steel, Stainless Steel, Copper, Titanium, Nickel, Cast Iron, Aluminum Magnesium and Synthetic Materials Material Application, H4 Thread Limit