M4 x .7 Form Tap, Bottoming DIN 371 Standard, HSS-E-PM (PM Cobalt), D6/D7, TiN Coated, Oil Grooves, Coolant Fed Type: Form Tap,Number of Flutes: 4,Hole Type :Blind Hole 63mm Overall Length, 4.5mm Shank Diameter, 21mm Threading Depth, With Coolant Through, Chamfer Form E: 1.5 to 2 Lead Threads Series No. 1725, Order Code 04.0000, Guhring Part #9017250040000