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Insize INSTCS16 16.5mm 3 Flute HSS M2 Countersink

by Insize
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Original price $34.80
Original price $34.80 - Original price $34.80
Original price $34.80
Current price $29.58
$29.58 - $29.58
Current price $29.58

Insize Countersinks are made from 100% M42 Cobalt High Speed Steel. They are used for countersinking holes and deburring in a wide variety of materials including ferrous and non-ferrous metals. The triple, wide angled fluted design is self-centering allowing the user to provide a heavy,90 degree, chamfer to the entrance of a drilled hole. This chamfer may also be required to allow the correct seating of a countersink head screw or to provide the lead in for a second machining operation such as tapping. It can be used on medium to hard materials and has the ability to be re-sharpened.


  • Size: 3 - 16.5 mm, shank diameter 10mm
  • Packaged dimensions: 100(L) x 30(W) x 30(H)mm
  • Weight(net): 49 grams