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COUNTER BORES

Made from high speed steel. These are used for the socket head of cap screws. Available in straight shank and taper shank.



SCREW SIZE PILOT DIA.
INCHES
CUTTING DIA.
INCHES
SHANK DIA.
INCHES
OVERALL LENGTH
INCHES
ORDERING OPTIONS
CATALOG CODE NUMERIC CODE
1/4" 9/32 13/32 3/8 5 RSCB - SS - 0140 108661
5/16" 11/32 1/2" 7/16 5 RSCB - SS - 0516 108662
3/8" 13/32 19/32 1/2 6 RSCB - SS - 0380 108663
7/16" 15/32 11/16 1/2 7 RSCB - SS - 0716 108664
1/2" 17/32 25/32 3/4 7 1/2 RSCB - SS - 0120 108665
5/8" 21/32 31/32 3/4 7 1/2 RSCB - SS - 0580 108666
3/4" 25/32 1 3/16 1 8 RSCB - SS - 0340 108667
7/8" 15/32 1 3/8 1 8 RSCB - SS - 0780 108668
1" 1 1/16  1 9/16 1 10 RSCB - SS - 1000 108669

TAPER SHANK

1/4" 9/32 13/32 MT 2 5 3/4 RTCB - M2 - 0140 108671
5/16" 11/32 1/2" MT 2 6 RTCB - M2 - 0516 108672
3/8" 13/32 19/32 MT 2 6 1/2 RTCB - M2 - 0380 108673
7/16" 15/32 11/16 MT 2 7 RTCB - M2 - 0716 108674
1/2" 17/32 25/32 MT 2 7 1/4 RTCB - M2 - 0120 108675
5/8" 21/32 31/32 MT 3 7 1/2 RTCB - M3 - 0580 108676
3/4" 25/32 1 3/16 MT 3 9 RTCB - M3 - 0340 108677
7/8" 15/16 1 3/8 MT 3 9 RTCB - M3 - 0780 108678
1" 1 1/16  1 9/16 MT 3 10 RTCB - M3 - 1000 108679

    

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