G57031.0 Countersink - 90°

Countersink with 3-flutes, 90° chamfering angle, maximum diameter 31.00mm with an overall length of 71mm and a head length of 24.4mm and 12mm straight 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, cobalt based HSS-E with standard AlTiCN coating for machining alloy and tool steel, ferritic, martensitic and austenitic stainless steel and grey, malleable, ductile and compacted graphite cast-iron