M8 x 1.25 Red Ring Spiral Point Plug DIN 371 Standard Tap, D4/D5, HSS-E (Cobalt), Bright Finish Type: Red Ring,Number of Flutes: 3,Hole Type :Through Hole 90mm Overall Length, 8mm Shank Diameter, 35mm Threading Depth, Without Coolant Through, Chamfer Form B: 3.5 to 5 Lead Threads Series No. 804, Order Code 08.0000, Guhring Part #9008040080000