HSS Capscrew Counterbores
Atlas Cutting Tools stocks USA precision Capscrew Counterbores. Buy with confidence and at competitive prices along with same day shipping.
Our HSS (High Speed Steel) Cap Screw Counterbores cut a flat-bottomed cylindrical recess so a socket head cap screw can sit flush with or below the surface of a part. A built-in pilot runs in the existing hole to hold the tool on center. This is a counterbore, not a countersink: a countersink cuts a cone for a flat-head screw, while a counterbore cuts a flat seat for a socket or hex head.
HSS Capscrew Counterbores
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Have a question or need help? Call Customer Service at 908-98-ATLAS or email: Sales@atlascuttingtools.com |
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Compare SKU Vendor Size (D1) Decimal Equivalent (D1) Flute Diameter (D1) Shank Diameter (D2) Pilot Length (L2) Pilot Diameter (D3) Flute Length (L2) Overall Length (L1) Total Reach (L3) Axial Chamfer Morse Taper Small Diameter Large Diameter Body Length (L3) Size of Square Hex Shank Diameter Number of Flutes Coating In Stock Price Quantity A53631 ACT #4 0.183 1/8 .1120 3-7/8 9/16 Uncoated 21 $33.15 -
A53645 ACT #4 0.199 1/8 .1270 3-7/8 9/16 Uncoated 15 $31.88 -
A53659 ACT #4 0.215 1/8 .1430 3-7/8 9/16 Uncoated 22 $31.96 -
A53632 ACT #5 0.205 5/32 .1250 4-1/8 5/8 Uncoated 10 $23.96 -
A53646 ACT #5 0.221 5/32 .1400 4-1/8 5/8 Uncoated 6 $23.96 -
A53660 ACT #5 0.237 5/32 .1560 4-1/8 5/8 Uncoated 12 $31.96 -
A53633 ACT #6 0.227 3/16 .1380 4-5/8 3/4 Uncoated 11 $33.69 -
A53647 ACT #6 0.243 3/16 .1530 4-5/8 3/4 Uncoated 16 $33.69 -
A53661 ACT #6 0.259 3/16 .1690 4-5/8 3/4 Uncoated 9 $33.69 -
A53634 ACT #8 0.27 7/32 .1640 5 3/4 Uncoated 10 $36.12 -
A53648 ACT #8 0.286 7/32 .1790 5 3/4 Uncoated 18 $36.12 -
A53662 ACT #8 0.302 7/32 .1950 5 3/4 Uncoated 17 $36.12 -
A53635 ACT #10 0.312 1/4 .1900 5-1/4 7/8 Uncoated 16 $36.91 -
A53649 ACT #10 0.328 1/4 .2050 5-1/4 7/8 Uncoated 21 $36.91 -
A53663 ACT #10 0.344 1/4 .2210 5-1/4 7/8 Uncoated 16 $36.91 -
A53636 ACT 1/4 0.2500 0.38 9/32 .2500 5-5/8 1 Uncoated 20 $38.97 -
A53650 ACT 1/4 0.2500 0.396 9/32 .2650 5-5/8 1 Uncoated 22 $38.97 -
A53664 ACT 1/4 0.2500 0.412 9/32 .2810 5-5/8 1 Uncoated 20 $38.97 -
A53637 ACT 5/16 0.3125 0.474 5/16 .3125 6-1/8 1 Uncoated 22 $48.66 -
A53651 ACT 5/16 0.3125 0.489 5/16 .3280 6-1/8 1 Uncoated 13 $48.66 -
A53665 ACT 5/16 0.3125 0.504 5/16 .3430 6-1/8 1 Uncoated 16 $48.66 -
A53638 ACT 3/8 0.3750 0.569 3/8 .3750 6-1/2 1-1/4 Uncoated 8 $53.11 -
A53652 ACT 3/8 0.3750 0.585 3/8 .3900 6-1/2 1-1/4 Uncoated 15 $53.11 -
A53666 ACT 3/8 0.3750 0.601 3/8 .4060 6-1/2 1-1/4 Uncoated 20 $53.11 -
A53639 ACT 7/16 0.4375 0.661 7/16 .4370 7 1-1/4 Uncoated 9 $63.62 -
A53653 ACT 7/16 0.4375 0.676 7/16 .4520 7 1-1/4 Uncoated 15 $63.62 -
A53667 ACT 7/16 0.4375 0.691 7/16 .4680 7 1-1/4 Uncoated 23 $63.62 -
A53640 ACT 1/2 0.5000 0.755 1/2 .5000 7-1/2 1-1/2 Uncoated 18 $75.21 -
A53654 ACT 1/2 0.5000 0.771 1/2 .5150 7-1/2 1-1/2 Uncoated 10 $74.71 -
A53668 ACT 1/2 0.5000 0.787 1/2 .5310 7-1/2 1-1/2 Uncoated 17 $74.71 -
A53641 ACT 5/8 0.6250 0.943 5/8 .6250 7-5/8 1-1/2 Uncoated 15 $122.13 -
A53655 ACT 5/8 0.6250 0.959 5/8 .6400 7-5/8 1-1/2 Uncoated 15 $128.19 -
A53669 ACT 5/8 0.6250 0.975 5/8 .6560 7-5/8 1-1/2 Uncoated 20 $122.09 -
A53642 ACT 3/4 0.7500 1.131 3/4 .7500 7-3/8 1-5/8 Uncoated 20 $141.22 -
A53656 ACT 3/4 0.7500 1.147 3/4 .7650 7-3/4 1-5/8 Uncoated 14 $102.13 -
A53670 ACT 3/4 0.7500 1.163 3/4 .7810 7-3/4 1-5/8 Uncoated 16 $140.93 -
A53643 ACT 7/8 0.8750 1.32 7/8 .8750 8 1-7/8 Uncoated 2 $123.78 -
A53657 ACT 7/8 0.8750 1.336 7/8 .8910 8 1-7/8 Uncoated 6 $129.92 -
A53671 ACT 7/8 0.8750 1.352 7/8 .9060 8 1-7/8 Uncoated 8 $123.53 -
A53644 ACT 1 1.0000 1.508 1 1.000 8-1/2 2 Uncoated 10 $164.31 -
A53672 ACT 1 1.0000 1.540 1 1.0310 8-1/2 2 Uncoated 1 $156.35