5/16-24 Spiral Point Plug DIN 371 Standard Tap, HSS-E-PM (PM Cobalt), H4/H5, TiAlN Coated Type: Grey Ring,Number of Flutes: 4,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. 2919, Order Code 07.9380, Guhring Part #9029190079380