Emuge Spiral Flute Tap, Form D Reinforced Shank, Series: 452, Measurement System: Imperial, UNF, 1/4-28, Plug Chamfer, 3 Flutes, HSS-E, NT2 Coated, Class of Fit: 2BX, Left Hand Cutting, 0.669 in Thread Length, 3.15 in Overall Length, 0.255 in Shank Dia, Left Hand Flute Direction, Steel, Stainless Steel, Cast Iron, Copper Alloys, Titanium Alloys, Nickel Base Alloys and Cobalt Base Alloys Material Application, No Through Coolant (Yes/No)