M3 x .5 Form Tap, Solid Carbide Bottoming DIN 371 Standard, D5/D6, TiCN Coated, Oil Grooves Type: Form Tap,Number of Flutes: 4,Hole Type :Blind Hole 56mm Overall Length, 3.5mm Shank Diameter, 18mm Threading Depth, With Radial Coolant Through, Chamfer Form E: 1.5 to 2 Lead Threads Series No. 1927, Order Code 03.0000, Guhring Part #9019270030000