G10631.0 Countersink with Tri-Flat shank - 90°

Countersink with 3-flutes, 90° chamfering angle, maximum diameter 31.00mm with an overall length of 71mm and a head length of 18.5mm and 12mm tri-flat shank, according to DIN 335 C standard to produce a conical seat for ISO Metric countersunk-head screws with a minium hole diameter of 4.20mm, HSS with standard bright finish for machining free machining, plain carbon and alloy steel, grey cast-iron, copper or copper alloys