Description
Countersink with 3-flutes, 90° chamfering angle, maximum diameter 8.30mm with an overall length of 155mm and a head length of 6.9mm and 6mm straight extended shank, according to DORMER standard to produce a conical seat for ISO Metric countersunk-head screws with a minium hole diameter of 1.80mm, HSS with standard bright finish for machining free machining, plain carbon and alloy steel
