M5 x .8 Red Ring Spiral Flute Semi-Bottom DIN 371 Standard Tap, HSS-E (Cobalt), D3/D4, Bright Finish, Coolant Fed Type: Red Ring,Number of Flutes: 3,Hole Type :Blind Hole 70mm Overall Length, 6mm Shank Diameter, 25mm Threading Depth, With Axial Coolant Through, Chamfer Form C: 2 to 3 Lead Threads Series No. 1894, Order Code 05.0000, Guhring Part #9018940050000