MORSE Spiral Point Tap, High Performance, Series: 2095, Measurement System: Imperial, UNC, #4-40, Plug Chamfer, 2 Flutes, HSS-PM, Black Steam Oxide, Right Hand Cutting, 5/16 in Thread Length, 1-7/8 in Overall Length, Steels, Steel Alloy, Stainless Steels, Titanium Alloy, Nickel, Nickel Base Alloy, Other Exotic Alloy and Materials up to 34Rc Hardness Material Application, H2 Thread Limit