M10 x 1 Green Ring Spiral Point Plug DIN 374 Small Shank Tap, HSS-E (Cobalt), D4/D5, Steam Oxide Finish Type: Green Ring,Number of Flutes: 3,Hole Type :Through Hole 90mm Overall Length, 7mm Shank Diameter, Without Coolant Through, Chamfer Form B: 3.5 to 5 Lead Threads Series No. 2879, Order Code 10.0050, Guhring Part #9028790100050