M20 x 2.5 Carbide Tap, Straight Flute Semi-Bottoming, DIN 376 Small Shank, D7/D8, Bright Finish, Coolant Fed Type: Black/White,Number of Flutes: 4,Hole Type :Blind Hole 140mm Overall Length, 16mm Shank Diameter, With Axial Coolant Through, Chamfer Form C: 2 to 3 Lead Threads Series No. 1883, Order Code 20.0000, Guhring Part #9018830200000