90 Degree HSS Co5 Triple Flute Countersink Size:40mm 90 Degree HSS Co5 Triple Flute Countersink Reduced shank HSS twist drill

Reduced shank HSS twist drill set

electrical

have straight flutes supplemented by angular cutting faces at the lead

Coarse-pitched tapered screw thread

90 Degree HSS Co5 Triple Flute Countersink Size:40mm 90 Degree HSS Co5 Triple Flute Countersink Reduced shank HSS twist drill90 Degree HSS Co5 Triple Flute Countersink Triple flute countersinks are ideal for countersinking and deburring in a wide range of materials including ferrous and non ferrous metals. The three fluted countersink is self centering with wide flutes and is used to provide a heavy chamfer in the entrance to a drilled hole. This may be required to allow the correct seating for a countersunk head screw or to provide the lead in for a second machining