Guhring Spiral Point Tap, Series: 4404, Measurement System: Imperial, UNC Thread Standard, 5/16-18 Thread, Plug Chamfer, 3 Flutes, HSS-E, TiCN Coated, Class of Fit: 2B/3B, Right Hand Cutting Direction, 0.709 in Thread Length, 2.72 in Overall Length, 0.318 in Shank Diameter, Aluminum, Alloy Steels, Free Cutting Steels, Tool Steels, Stainless Steels, Cast Iron and Hardened Steels Material Application, H5 Thread Limit, No Through Coolant