EXOPIPE® Pipe Tap, High Performance, Series: 308, Measurement System: Imperial, 3/8-18 Thread, NPT Thread Standard, 15 deg Helix Angle, 2.5P Tapered Chamfer, 1-1/16 in Thread Length, 2-9/16 in Overall Length, 4 Flutes, Right Hand Cutting Direction, 0.7 in Shank Diameter, 9/16 in Tap Drill, 0.531 in Square, HSS-E, Steam Oxide