M8 x 1 Red Ring Spiral Flute Semi-Bottoming DIN 374 Small Shank Tap, HSS-E (Cobalt), D4/D5, Bright Finish Type: Red Ring,Number of Flutes: 3,Hole Type :Blind Hole 90mm Overall Length, 6mm Shank Diameter, Without Coolant Through, Chamfer Form C: 2 to 3 Lead Threads Series No. 835, Order Code 08.0050, Guhring Part #9008350080050