Union Butterfield® Straight Flute Hand Tap, General Purpose, Series: 1500L, Measurement System: Imperial, UNC, 9/16-12, Plug Chamfer, 4 Flutes, HSS, Bright, Class of Fit: 3B, Left Hand Cutting, 1-21/32 in Thread Length, 3-19/32 in Overall Length, 0.429 in Shank Dia, Steel, Stainless Steel, Copper, Titanium, Nickel, Cast Iron, Aluminum Magnesium and Synthetic Materials Material Application, H3 Thread Limit