M3.5 x .6 Form Tap, Semi-Bottoming DIN 371 Standard, HSS-E (Cobalt), D6/D7, TiN Coated With Oil Grooves Type: Form Tap,Number of Flutes: 4,Hole Type :Blind Hole 56mm Overall Length, 4mm Shank Diameter, 20mm Threading Depth, Without Coolant Through, Chamfer Form C: 2 to 3 Lead Threads Series No. 919, Order Code 03.5000, Guhring Part #9009190035000