12-28 Spiral Point Plug DIN 371 Standard Tap, HSS-E-PM (PM Cobalt), H4/H5, TiCN Coated Type: Grey Ring,Number of Flutes: 3,Hole Type :Through Hole 80mm Overall Length, 6mm Shank Diameter, 30mm Threading Depth, Without Coolant Through, Chamfer Form B: 3.5 to 5 Lead Threads Series No. 2907, Order Code 05.4860, Guhring Part #9029070054860