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About Countersinks
Countersinks cut a cone-shaped opening to install screws and rivets flush with a surface or hold workpieces between centers on a lathe. They can also be used for chamfering and deburring.
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High-Speed Steel Drill-Point Countersinks for Screws
A small drill point at the tip lets you use the same tool for drilling and counterboring holes. An 82° countersink angle is compatible with the profile of flat- and oval-head inch screws; a 90° countersink angle is compatible with the profile of flat- and oval-head metric screws and is also good for deburring.
For technical drawings and 3-D models, click on a part number.
Dia. | 82° Countersink Angle | ||||||
|---|---|---|---|---|---|---|---|
| For Screw Size | Body | Shank | Drill Tip | Overall Lg. | For Use On | Each | |
Uncoated High-Speed Steel | |||||||
2 Flute | |||||||
| No. 10 | 7/16" | 1/4" | 0.192" | 2" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 000000 |
High-Speed Steel Drill-Bit Countersinks for Screws
For use on wood, plastic, and most metals, these countersinks attach to a drill bit (sold separately) to countersink and drill holes at the same time. They attach to the drill bit with two set screws and the position can be adjusted for different screw lengths. An 82° countersink angle is compatible with the profile of flat- and oval-head inch screws; a 90° countersink angle is compatible with the profile of flat- and oval-head metric screws and is also good for deburring.
Optional collar (not included) controls the cutting depth of your countersink. It attaches with two set screws.
For technical drawings and 3-D models, click on a part number.
Countersinks | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
82° Countersink Angle | 90° Countersink Angle | Optional Collars | ||||||||||
| For Screw Size | For Drill Bit Size | Body Dia. | Overall Lg. | For Use On | Each | Each | OD | Wd. | Each | |||
Uncoated High-Speed Steel | ||||||||||||
4 Flute | ||||||||||||
| No. 10 | 13/64" | 3/8" | 7/8" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel, Wood | 0000000 | 000000 | 0000000 | 000000 | 5/8" | 1/4" | 0000000 | 00000 |
| No. 10 | 13/64" | 7/16" | 7/8" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel, Wood | 0000000 | 00000 | 0000000 | 00000 | 11/16" | 1/4" | 0000000 | 0000 |
| No. 10 | 13/64" | 1/2" | 7/8" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel, Wood | 0000000 | 00000 | 0000000 | 00000 | 3/4" | 1/4" | 0000000 | 0000 |
Carbon Steel Drill-Bit Countersinks for Screws
Only for use on wood and plastic, these countersinks attach to a drill bit (sold separately) to countersink and drill holes at the same time. They attach to the drill bit with two set screws and the position can be adjusted for different screw lengths. The 82° countersink angle is compatible with the profile of flat- and oval-head inch screws.
Optional collar (not included) controls the cutting depth of your countersink. It attaches with two set screws.
For technical drawings and 3-D models, click on a part number.
Countersinks | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
82° Countersink Angle | Optional Collars | |||||||||
| For Screw Size | For Drill Bit Size | Body Dia. | Overall Lg. | For Use On | Each | OD | Wd. | Each | ||
Uncoated Carbon Steel | ||||||||||
4 Flute | ||||||||||
| No. 10 | 13/64" | 3/8" | 7/8" | Plastic, Wood | 0000000 | 00000 | 5/8" | 1/4" | 0000000 | 00000 |
| No. 10 | 13/64" | 7/16" | 7/8" | Plastic, Wood | 0000000 | 00000 | 11/16" | 1/4" | 0000000 | 0000 |
| No. 10 | 13/64" | 1/2" | 7/8" | Plastic, Wood | 0000000 | 00000 | 3/4" | 1/4" | 0000000 | 0000 |
Drill-Bit Countersinks with Drill Bit
These countersinks come attached to a high-speed steel jobbers’ bit for drilling and countersinking at the same time. They have a hex shank that fits in all quick-change and standard drill chucks. The bit is held in place with a set screw and can be adjusted up to 1” for different screw lengths. The 82° countersink angle is compatible with the profile of flat- and oval-head inch screws.
For technical drawings and 3-D models, click on a part number.
Countersinks | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
For Screw Size | 82° Countersink Angle | Replacement Drill Bits | |||||||||
| Hard Wood | Soft Wood | Drill Bit Size | Body Dia. | Shank Size | Overall Lg. | Max. Hole Drilling Dp. | For Use On | Each | Each | ||
Uncoated High-Speed Steel | |||||||||||
2 Flute | |||||||||||
| No. 10 | No. 12 | 9/64" | 1/2" | 1/4" | 3 3/32" | 1" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel, Wood | 0000000 | 00000 | 0000000 | 00000 |
| No. 8 | No. 10 | 1/8" | 1/2" | 1/4" | 2 31/32" | 1" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel, Wood | 0000000 | 0000 | 0000000 | 0000 |
Countersinking Drill Bits for Screws
Also known as step drill bits, these bits countersink as they drill. The 82° countersink angle is compatible with the profile of flat- and oval-head inch screws. After multiple sharpenings, the drill bit diameter may become smaller.
For technical drawings and 3-D models, click on a part number.
Dia. | Lg. | 82° Countersink Angle | |||||||
|---|---|---|---|---|---|---|---|---|---|
| For Screw Size | Body | Step | Step | Overall | Shank Dia. | Point Angle | For Use On | Each | |
Uncoated High-Speed Steel | |||||||||
2 Flute | |||||||||
| No. 10 | 0.386" | 0.196" | 5/8" | 5 1/8" | 0.3860" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
Quick-Change Combination Countersinking Drill and Screwdriver Bits
Drill, countersink, and drive screws without switching three separate bits in and out of your power tool. With a single hand, flip between drilling countersunk holes and driving screws. The countersinking drill and screwdriver bit are secured with set screws, so you can switch them out for any bits with a 1/4” hex shank.
The countersinking drill has an 82° angle, allowing inch-sized flat- and oval-head screws to sit flush with the surface.
For technical drawings and 3-D models, click on a part number.
Combination Countersinking Drill and Screwdriver Bits | Replacement Drill Bits | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Screw Size | Drill Bit Size | Countersink Body Dia. | Max. Hole Drilling Dp. | Countersink Angle | Screwdriver Bit Size | For Drive Style | Adapter Hex Shank Size | Adapter Lg. | For Use On | Each | Each | ||
Black-Oxide High-Speed Steel Countersink | |||||||||||||
4 Countersink Flutes | |||||||||||||
| No. 10 | 1/8" | 3/8" | 2 1/4" | 82° | No. 2 | Phillips | 5/16" | 3 3/4" | Aluminum, Fiberglass, Plastic, Wood | 0000000 | 000000 | 0000000 | 00000 |
High-Speed Steel Drill-Point Countersink Sets for Screws
Small drill points let you drill and countersink holes with the same tool. The 82° countersink angle is compatible with the profile of flat- and oval-head inch screws.
For technical drawings and 3-D models, click on a part number.
82° Countersink Angle | ||||||||
|---|---|---|---|---|---|---|---|---|
| For Screw Size | Number of Pieces | Number of Flutes | Number of Countersinking Ends | Shank Type | For Use On | Container Type | Set | |
Uncoated High-Speed Steel | ||||||||
| No. 5, No. 6, No. 8, No. 10, No. 12, 1/4", 5/16", 3/8" | 8 | 2 | 1 | Round | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | Plastic Case | 00000000 | 0000000 |