Guhring Thread Forming Tap, 8-Pitch Straight, Series: 4289, Measurement System: Imperial, 1-3/4-8 Thread, UNF Thread Standard, Modified Bottoming Chamfer, 7.874 in Overall Length, 6 Flutes, Right Hand Cutting Direction, Class of Fit: 2B, 1.43 in Shank Diameter, 1.615 to 1.64 in Tap Drill, 1.072 in Square, HSS-E, TiN Coated, H7 Thread Limit