STM, 123402, Spiral Flute Tap, NPT Thread Standard, 1/8 to 27 in Thread, 2.5P Plug Chamfer, 4 Flutes, HSSE-V3, Black Oxide, 0.75 in Thread Length, 2-1/8 in Overall Length, Right Flute Direction, Steels & Other Materials Up To 35HRC Material Application, Through Coolant (Yes/No): No