35-20.5mm 3 Flute Countersink C107 2050 90 Degree 1840482 Hollow punches

Hollow punches

1 3/8" - 1 3/4"

whose diameter increases or decreases along the length of the thread

The unique annular (hollow design allows Twister Bits to cut up to 4x faster than spade and twist drills

- Provides an economical brushing tool of medium fill density for general brushing

35-20.5mm 3 Flute Countersink C107 2050 90 Degree 1840482 Hollow punchesThree Flute Countersink 90 degrees , DIN 335 Countersinking Counterboring screw holes for Countersunk screws acc. to DIN 963, 964, 965, 966, 7513, 7516 For Countersunk screws acc. to ISO 2009, 2010, 7046 1, 7046 2, 7047 Chamfering of tapping holes For use in machine applications. Type N For non ferrous, Type UNI For difficult to machine materials