M6 x 1 Yellow Ring Spiral Point Plug DIN 376 Small Shank Tap, HSS-E (Cobalt), D4/D5, Bright Finish Type: Yellow Ring,Number of Flutes: 3,Hole Type :Through Hole 80mm Overall Length, 4.5mm Shank Diameter, Without Coolant Through, Chamfer Form B: 3.5 to 5 Lead Threads Series No. 815, Order Code 06.0000, Guhring Part #9008150060000