Countersink with 3-flutes, 100° chamfering angle, maximum diameter 20.50mm with an overall length of 61mm and a head length of 11mm and 10mm straight shank, according to DIN 335 C standard produce a conical seat for BS standard countersunk-head screws and aviation fasteners with a minium hole diameter of 3.50mm, HSS with standard TiAlN coating for machining steel and cast steel, grey, malleable, ductile and compacted graphite cast-iron, cast aluminium and copper or copper alloys
Applications:
P - Steel and cast steel(steels with alloy content ? 10% and a hardness of < 45HRC) - Primary use
M - Stainless steel(corrosion resistant steels with ? 11% chromium content) - Possible use
K - Cast Iron(castings of iron and carbon alloys with > 2% carbon content) - Primary use
N - Non-ferrous metals(metals including alloys without an appreciable amount of iron) - Primary use
For additional details please check the Manufacturer's site: