Filter by
System of Measurement
Number of Flutes
Countersink Type
Sold As
For Cutting
Finish
Manufacturer
U.S.–Mexico–Canada Agreement (USMCA) Qualifying
DFARS Specialty Metals
REACH
RoHS
Export Control Classification Number (ECCN)
Flute Type
Number of Countersinking Ends
Container Type
Counterbore Type
About Countersinks
%20--%3e%3csvg%20version='1.1'%20id='Layer_1'%20xmlns='http://www.w3.org/2000/svg'%20xmlns:xlink='http://www.w3.org/1999/xlink'%20x='0px'%20y='0px'%20viewBox='0%200%20400%20400'%20style='enable-background:new%200%200%20400%20400;'%20xml:space='preserve'%3e%3cstyle%20type='text/css'%3e%20.st0{fill:%231A70A0;}%20.st1{opacity:0.5;}%20%3c/style%3e%3cg%3e%3cg%3e%3cpath%20class='st0'%20d='M200,56.9c38.35,0,74.4,14.93,101.51,42.05c27.11,27.11,42.05,63.17,42.05,101.51s-14.93,74.4-42.05,101.51%20S238.35,344.02,200,344.02s-74.4-14.93-101.51-42.05c-27.11-27.11-42.05-63.17-42.05-101.51s14.93-74.4,42.05-101.51%20S161.65,56.9,200,56.9%20M200,12.9C96.41,12.9,12.44,96.88,12.44,200.46c0,103.59,83.97,187.56,187.56,187.56%20c103.59,0,187.56-83.97,187.56-187.56C387.56,96.88,303.59,12.9,200,12.9L200,12.9z'/%3e%3c/g%3e%3cg%3e%3cg%20class='st1'%3e%3cpath%20class='st0'%20d='M235.49,152.24h16.15l-27.46,111.87c-1.94,7.8-2.91,12.5-2.91,14.1c0,1.82,0.58,3.29,1.73,4.41%20c1.16,1.12,2.69,1.68,4.61,1.68c5.23,0,11.78-3.85,19.63-11.55l17.22,21.34c-16.95,17.33-34.87,26-53.78,26%20c-8.37,0-15.45-1.47-21.23-4.41c-5.79-2.94-10.44-7.25-13.95-12.92c-3.51-5.67-5.27-11.18-5.27-16.53c0-1.93,0.35-5.24,1.05-9.94%20c1-6.94,2.05-12.54,3.15-16.82l15.22-62.15h-32.69l7.65-30.97C190.89,163.58,214.53,158.88,235.49,152.24z%20M230.44,80.84%20c8.24,0,14.66,2.62,19.26,7.86c4.6,5.24,6.9,11.55,6.9,18.94c0,5.46-1.42,10.7-4.25,15.73c-2.83,5.03-6.88,9.07-12.12,12.12%20c-5.24,3.05-10.33,4.57-15.24,4.57c-4.6,0-9.17-1.23-13.72-3.69c-4.55-2.46-8.02-5.78-10.43-9.95%20c-2.41-4.17-3.61-8.67-3.61-13.48c0-5.35,1.52-10.64,4.57-15.89c3.05-5.24,7.03-9.25,11.96-12.04%20C218.68,82.23,224.24,80.84,230.44,80.84z'/%3e%3c/g%3e%3cg%3e%3cpath%20class='st0'%20d='M214.08,152.24h16.15l-27.46,111.87c-1.94,7.8-2.91,12.5-2.91,14.1c0,1.82,0.58,3.29,1.73,4.41%20c1.16,1.12,2.69,1.68,4.61,1.68c5.23,0,11.78-3.85,19.63-11.55l17.22,21.34c-16.95,17.33-34.87,26-53.78,26%20c-8.37,0-15.45-1.47-21.23-4.41c-5.79-2.94-10.44-7.25-13.95-12.92c-3.51-5.67-5.27-11.18-5.27-16.53c0-1.93,0.35-5.24,1.05-9.94%20c1-6.94,2.05-12.54,3.15-16.82l15.22-62.15h-32.69l7.65-30.97C169.48,163.58,193.11,158.88,214.08,152.24z%20M209.03,80.84%20c8.24,0,14.66,2.62,19.26,7.86c4.6,5.24,6.9,11.55,6.9,18.94c0,5.46-1.42,10.7-4.25,15.73c-2.83,5.03-6.88,9.07-12.12,12.12%20c-5.24,3.05-10.33,4.57-15.24,4.57c-4.6,0-9.17-1.23-13.72-3.69c-4.55-2.46-8.02-5.78-10.43-9.95%20c-2.41-4.17-3.61-8.67-3.61-13.48c0-5.35,1.52-10.64,4.57-15.89c3.05-5.24,7.03-9.25,11.96-12.04%20C197.26,82.23,202.83,80.84,209.03,80.84z'/%3e%3c/g%3e%3c/g%3e%3c/g%3e%3c/svg%3e){kind=small}
Choose the right countersink angle, body diameter, and number of flutes for your application.
Drill-Bit Countersinks for Wood and Plastic
High-Speed Steel
 |
4 Flutes |
The choice if you're countersinking lots of holes, these wear-resistant countersinks cut faster and last longer than carbon steel.
Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.
Countersinks | Counterbore Collars | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Uncoated | ||||||||||||
Body Dia. | For Drill Bit Size | For Screw Size | Overall Lg. | Mfr. | Each | OD | Wd. | Each | ||||
4 Flutes | ||||||||||||
82° Countersink Angle | ||||||||||||
| 1/4" | 3/32" | No. 3 | 3/4" | W. L. Fuller | 2910A11 | 000000 | 1/2" | 1/4" | 2903A11 | 00000 | ||
| 5/16" | 7/64" | No. 4 | 3/4" | W. L. Fuller | 2910A12 | 00000 | 9/16" | 1/4" | 2903A12 | 0000 | ||
| 3/8" | 1/8" | No. 5 | 7/8" | W. L. Fuller | 2910A13 | 00000 | 5/8" | 1/4" | 2903A13 | 0000 | ||
| 3/8" | 9/64" | No. 6 | 7/8" | W. L. Fuller | 2910A14 | 00000 | 5/8" | 1/4" | 2903A13 | 0000 | ||
| 3/8" | 5/32" | No. 7 | 7/8" | W. L. Fuller | 2910A15 | 00000 | 5/8" | 1/4" | 2903A13 | 0000 | ||
| 3/8" | 11/64" | No. 8 | 7/8" | W. L. Fuller | 2910A16 | 00000 | 5/8" | 1/4" | 2903A13 | 0000 | ||
| 3/8" | 3/16" | No. 9 | 7/8" | W. L. Fuller | 2910A17 | 00000 | 5/8" | 1/4" | 2903A13 | 0000 | ||
| 3/8" | 13/64" | No. 10 | 7/8" | W. L. Fuller | 2910A29 | 00000 | 5/8" | 1/4" | 2903A13 | 0000 | ||
| 3/8" | 7/32" | No. 12 | 7/8" | W. L. Fuller | 2910A31 | 00000 | 5/8" | 1/4" | 2903A13 | 0000 | ||
| 7/16" | 13/64" | No. 10 | 7/8" | W. L. Fuller | 2910A18 | 00000 | 11/16" | 1/4" | 2903A14 | 0000 | ||
| 1/2" | 5/32" | No. 7 | 7/8" | W. L. Fuller | 2910A32 | 00000 | 3/4" | 1/4" | 2903A15 | 0000 | ||
| 1/2" | 3/16" | No. 9 | 7/8" | W. L. Fuller | 2910A27 | 00000 | 3/4" | 1/4" | 2903A15 | 0000 | ||
| 1/2" | 13/64" | No. 10 | 7/8" | W. L. Fuller | 2910A19 | 00000 | 3/4" | 1/4" | 2903A15 | 0000 | ||
| 1/2" | 7/32" | No. 12 | 7/8" | W. L. Fuller | 2910A21 | 00000 | 3/4" | 1/4" | 2903A15 | 0000 | ||
| 1/2" | 1/4" | No. 14 | 7/8" | W. L. Fuller | 2910A22 | 00000 | 3/4" | 1/4" | 2903A15 | 0000 | ||
| 5/8" | 3/16" | No. 9 | 1 1/16" | W. L. Fuller | 2910A23 | 00000 | 7/8" | 1/4" | 2903A17 | 0000 | ||
| 5/8" | 1/4" | No. 16 | 1 1/16" | W. L. Fuller | 2910A24 | 00000 | 7/8" | 1/4" | 2903A17 | 0000 | ||
| 5/8" | 9/32" | No. 16 | 1 1/16" | W. L. Fuller | 2910A25 | 00000 | 7/8" | 1/4" | 2903A17 | 0000 | ||
| 5/8" | 5/16" | No. 18 | 1 1/16" | W. L. Fuller | 2910A26 | 00000 | 7/8" | 1/4" | 2903A17 | 0000 | ||
90° Countersink Angle | ||||||||||||
| 1/4" | 3/32" | No. 3 | 3/4" | W. L. Fuller | 2910A71 | 00000 | 1/2" | 1/4" | 2903A11 | 0000 | ||
| 5/16" | 7/64" | No. 4 | 3/4" | W. L. Fuller | 2910A72 | 00000 | 9/16" | 1/4" | 2903A12 | 0000 | ||
| 3/8" | 1/8" | No. 5 | 7/8" | W. L. Fuller | 2910A73 | 00000 | 5/8" | 1/4" | 2903A13 | 0000 | ||
| 3/8" | 9/64" | No. 6 | 7/8" | W. L. Fuller | 2910A74 | 00000 | 5/8" | 1/4" | 2903A13 | 0000 | ||
| 3/8" | 5/32" | No. 7 | 7/8" | W. L. Fuller | 2910A75 | 00000 | 5/8" | 1/4" | 2903A13 | 0000 | ||
| 3/8" | 11/64" | No. 8 | 7/8" | W. L. Fuller | 2910A76 | 00000 | 5/8" | 1/4" | 2903A13 | 0000 | ||
| 3/8" | 3/16" | No. 9 | 7/8" | W. L. Fuller | 2910A77 | 00000 | 5/8" | 1/4" | 2903A13 | 0000 | ||
| 3/8" | 13/64" | No. 10 | 7/8" | W. L. Fuller | 2910A89 | 00000 | 5/8" | 1/4" | 2903A13 | 0000 | ||
| 3/8" | 7/32" | No. 12 | 7/8" | W. L. Fuller | 2910A91 | 00000 | 5/8" | 1/4" | 2903A13 | 0000 | ||
| 7/16" | 13/64" | No. 10 | 7/8" | W. L. Fuller | 2910A78 | 00000 | 11/16" | 1/4" | 2903A14 | 0000 | ||
| 1/2" | 5/32" | No. 7 | 7/8" | W. L. Fuller | 2910A92 | 00000 | 3/4" | 1/4" | 2903A15 | 0000 | ||
| 1/2" | 3/16" | No. 9 | 7/8" | W. L. Fuller | 2910A87 | 00000 | 3/4" | 1/4" | 2903A15 | 0000 | ||
| 1/2" | 13/64" | No. 10 | 7/8" | W. L. Fuller | 2910A79 | 00000 | 3/4" | 1/4" | 2903A15 | 0000 | ||
| 1/2" | 7/32" | No. 12 | 7/8" | W. L. Fuller | 2910A81 | 00000 | 3/4" | 1/4" | 2903A15 | 0000 | ||
| 1/2" | 1/4" | No. 14 | 7/8" | W. L. Fuller | 2910A82 | 00000 | 3/4" | 1/4" | 2903A15 | 0000 | ||
| 5/8" | 3/16" | No. 9 | 1 1/16" | W. L. Fuller | 2910A83 | 00000 | 7/8" | 1/4" | 2903A17 | 0000 | ||
| 5/8" | 1/4" | No. 16 | 1 1/16" | W. L. Fuller | 2910A84 | 00000 | 7/8" | 1/4" | 2903A17 | 0000 | ||
| 5/8" | 9/32" | No. 16 | 1 1/16" | W. L. Fuller | 2910A85 | 00000 | 7/8" | 1/4" | 2903A17 | 0000 | ||
| 5/8" | 5/16" | No. 18 | 1 1/16" | W. L. Fuller | 2910A86 | 00000 | 7/8" | 1/4" | 2903A17 | 0000 | ||
Carbon Steel
|
4 Flutes |
Stronger than high-speed steel, so it will cut through harder materials. However, high-speed steel is more precise, lasts longer, and cuts at higher speeds.
Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.
Countersinks | Counterbore Collars | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Uncoated | ||||||||||||
Body Dia. | For Drill Bit Size | For Screw Size | Overall Lg. | Mfr. | Each | OD | Wd. | Each | ||||
4 Flutes | ||||||||||||
82° Countersink Angle | ||||||||||||
| 1/4" | 3/32" | No. 3 | 3/4" | W. L. Fuller | 2785A12 | 000000 | 1/2" | 1/4" | 2903A11 | 00000 | ||
| 5/16" | 7/64" | No. 4 | 7/8" | W. L. Fuller | 2785A13 | 00000 | 9/16" | 1/4" | 2903A12 | 0000 | ||
| 3/8" | 1/8" | No. 5 | 7/8" | W. L. Fuller | 2785A21 | 0000 | 5/8" | 1/4" | 2903A13 | 0000 | ||
| 3/8" | 9/64" | No. 6 | 7/8" | W. L. Fuller | 2785A22 | 0000 | 5/8" | 1/4" | 2903A13 | 0000 | ||
| 3/8" | 5/32" | No. 7 | 7/8" | W. L. Fuller | 2785A23 | 0000 | 5/8" | 1/4" | 2903A13 | 0000 | ||
| 3/8" | 11/64" | No. 8 | 7/8" | W. L. Fuller | 2785A24 | 0000 | 5/8" | 1/4" | 2903A13 | 0000 | ||
| 3/8" | 3/16" | No. 9 | 7/8" | W. L. Fuller | 2785A25 | 0000 | 5/8" | 1/4" | 2903A13 | 0000 | ||
| 3/8" | 13/64" | No. 10 | 7/8" | W. L. Fuller | 2785A26 | 0000 | 5/8" | 1/4" | 2903A13 | 0000 | ||
| 3/8" | 7/32" | No. 12 | 7/8" | W. L. Fuller | 2785A27 | 0000 | 5/8" | 1/4" | 2903A13 | 0000 | ||
| 7/16" | 13/64" | No. 10 | 7/8" | W. L. Fuller | 2785A31 | 00000 | 11/16" | 1/4" | 2903A14 | 0000 | ||
| 1/2" | 5/32" | No. 7 | 7/8" | W. L. Fuller | 2785A35 | 00000 | 3/4" | 1/4" | 2903A15 | 0000 | ||
| 1/2" | 3/16" | No. 9 | 7/8" | W. L. Fuller | 2785A37 | 00000 | 3/4" | 1/4" | 2903A15 | 0000 | ||
| 1/2" | 13/64" | No. 10 | 7/8" | W. L. Fuller | 2785A38 | 00000 | 3/4" | 1/4" | 2903A15 | 0000 | ||
| 1/2" | 7/32" | No. 12 | 7/8" | W. L. Fuller | 2785A39 | 00000 | 3/4" | 1/4" | 2903A15 | 0000 | ||
| 1/2" | 1/4" | No. 14 | 7/8" | W. L. Fuller | 2785A52 | 00000 | 3/4" | 1/4" | 2903A15 | 0000 | ||
| 5/8" | 3/16" | No. 9 | 1 1/16" | W. L. Fuller | 2785A53 | 00000 | 7/8" | 1/4" | 2903A17 | 0000 | ||
| 5/8" | 1/4" | No. 16 | 1 1/16" | W. L. Fuller | 2785A54 | 00000 | 7/8" | 1/4" | 2903A17 | 0000 | ||
| 5/8" | 9/32" | No. 16 | 1 1/16" | W. L. Fuller | 2785A56 | 00000 | 7/8" | 1/4" | 2903A17 | 0000 | ||
| 5/8" | 5/16" | No. 18 | 1 1/16" | W. L. Fuller | 2785A58 | 00000 | 7/8" | 1/4" | 2903A17 | 0000 | ||
Drill-Bit Countersink Sets for Wood and Plastic
 |
82° Countersink Angle | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
No. of Flutes | Body Dia. Included | No. of Pieces | For Drill Bit Size | Finish | Container Type | Mfr. | Each | |||
High-Speed Steel | ||||||||||
| 4 | 3/8", 7/16", 1/2" | 7 | 1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32" | Uncoated | Wood Stand | W. L. Fuller | 2910A41 | 0000000 | ||
| 4 | 3/8", 7/16", 1/2", 5/8" | 14 | 1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 1/4", 9/32", 5/16" | Uncoated | Wood Stand | W. L. Fuller | 2910A45 | 000000 | ||
Carbon Steel | ||||||||||
| 4 | 3/8", 7/16", 1/2" | 7 | 1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32" | Uncoated | Wood Stand | W. L. Fuller | 2785A46 | 00000 | ||
| 4 | 3/8", 7/16", 1/2", 5/8" | 14 | 1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 1/4", 9/32", 5/16" | Uncoated | Wood Stand | W. L. Fuller | 2785A48 | 000000 | ||
Drill-Bit Counterbore Sets for Wood
 |
Drill and counterbore holes of different depths without changing tools. These counterbores move along the drill bit (sold separately) and lock into place with set screws to match the length of the screw you're installing.
Body Dia. | No. of Pieces | Container Type | Mfr. | Each | |||
|---|---|---|---|---|---|---|---|
Uncoated Steel | |||||||
| 3/46", 1/4", 5/16", 3/8", 7/16", 1/2" | 6 | Wood Stand | W. L. Fuller | 3105A31 | 0000000 | ||
Drill-Bit Counterbores for Wood
 |
Shown with Drill Bit (Sold Separately) |
Drill and counterbore holes of different depths without changing tools. These counterbores move along the drill bit (sold separately) and lock into place with set screws to match the length of the screw you're installing.
Steel
 |  |
Counterbore Collars |
Counterbores | Counterbore Collars | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Uncoated | ||||||||||||
Body Dia. | Overall Lg. | No. of Flutes | For Drill Bit Size | Mfr. | Each | OD | Wd. | Each | ||||
| 5/8" | 1" | 4 | 3/16" | W. L. Fuller | 3105A11 | 000000 | 7/8" | 1/4" | 2903A17 | 00000 | ||
| 5/8" | 1" | 4 | 1/4" | W. L. Fuller | 3105A21 | 00000 | 7/8" | 1/4" | 2903A17 | 0000 | ||
| 3/4" | 1" | 4 | 1/4" | W. L. Fuller | 3105A12 | 00000 | 1" | 1/4" | 2903A18 | 0000 | ||
| 3/4" | 1 1/8" | 4 | 5/16" | W. L. Fuller | 3105A13 | 00000 | 1" | 1/4" | 2903A18 | 0000 | ||
| 7/8" | 1 1/4" | 4 | 3/8" | W. L. Fuller | 3105A14 | 00000 | 1 1/8" | 1/4" | 2903A19 | 0000 | ||
| 1" | 1 3/8" | 4 | 7/16" | W. L. Fuller | 3105A15 | 00000 | 1 1/4" | 5/16" | 2903A21 | 0000 | ||
| 1 1/8" | 1 1/2" | 4 | 1/2" | W. L. Fuller | 3105A16 | 00000 | 1 3/8" | 5/16" | 2903A32 | 0000 | ||
| 1 1/4" | 1 5/8" | 4 | 9/16" | W. L. Fuller | 3105A22 | 00000 | 1 1/2" | 3/8" | 2903A23 | 0000 | ||
