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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Long-Reach Countersink Heads for Screws
Add an extension (sold separately) to increase the reach of these countersink heads. 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.
Shank | ||||||
|---|---|---|---|---|---|---|
| Body Dia. | Thread Size | Dia. | Overall Lg. | For Use On | Each | |
82° Countersink Angle | ||||||
Uncoated High-Speed Steel | ||||||
2 Flute | ||||||
| 3/8" | 1/4"-28 | 1/4" | 3/4" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 1/2" | 1/4"-28 | 1/4" | 3/4" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
90° Countersink Angle | ||||||
Uncoated High-Speed Steel | ||||||
2 Flute | ||||||
| 3/8" | 1/4"-28 | 1/4" | 3/4" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| 1/2" | 1/4"-28 | 1/4" | 3/4" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| Overall Lg. | Body Dia. | For Shank Thread Size | Shank Dia. | For Use On | Each | |
Uncoated Carbon Steel | ||||||
|---|---|---|---|---|---|---|
| 4" | 3/8" | 1/4"-28 | 1/4" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 6" | 3/8" | 1/4"-28 | 1/4" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| 12" | 3/8" | 1/4"-28 | 1/4" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
Long-Reach Countersink Heads for Rivets
Add an extension (sold separately) to increase the reach of these countersink heads. The 100° countersink angle is compatible with the profile of rivets.
For technical drawings and 3-D models, click on a part number.
| Overall Lg. | Body Dia. | For Shank Thread Size | Shank Dia. | For Use On | Each | |
Uncoated Carbon Steel | ||||||
|---|---|---|---|---|---|---|
| 4" | 3/8" | 1/4"-28 | 1/4" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 6" | 3/8" | 1/4"-28 | 1/4" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| 12" | 3/8" | 1/4"-28 | 1/4" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
Tight-Spot Reverse Countersink Heads for Screws
If limited space makes it difficult to countersink your hole, access it from the other side with one of these tools. Put the shank in your drill chuck, insert the shank into a through hole, and attach the countersink head on the end. Pull back on the drill to countersink the backside of the hole. The 82° countersink angle is compatible with the profile of flat- and oval-head inch screws.
Shank (sold separately) is required. The shank diameter should match the diameter of your through hole.
For technical drawings and 3-D models, click on a part number.
Countersink Heads | Required Shanks | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Hole Dia. | Body Dia. | Overall Lg. | For Use On | Each | Shank Dia. | Overall Lg. | Each | ||
Uncoated High-Speed Steel | |||||||||
| 3/32" | 5/16" | 1/2" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 | 3/32" | 6" | 0000000 | 00000 |
| 1/8" | 5/16" | 1/2" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 | 1/8" | 6" | 0000000 | 0000 |
| 1/8" | 3/8" | 1/2" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 | 1/8" | 6" | 0000000 | 0000 |
| 5/32" | 5/16" | 1/2" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 | 5/32" | 6" | 0000000 | 0000 |
| 5/32" | 3/8" | 1/2" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 | 5/32" | 6" | 0000000 | 0000 |
| 5/32" | 1/2" | 1/2" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 | 5/32" | 6" | 0000000 | 0000 |
| 3/16" | 3/8" | 1/2" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 | 3/16" | 6" | 0000000 | 00000 |
| 3/16" | 1/2" | 1/2" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 | 3/16" | 6" | 0000000 | 00000 |
| 1/4" | 1/2" | 1/2" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 | 1/4" | 6" | 0000000 | 00000 |
Tight-Spot Reverse Countersink Heads for Rivets
In areas where limited space makes it difficult to countersink your hole, access it from the other side with one of these tools. Put the shank in your drill chuck, insert the shank into a through hole, and attach the countersink head on the end. Pull back on the drill to countersink the backside of the hole. The 100° countersink angle is compatible with the profile of rivets.
Shank (sold separately) is required. The shank diameter should match the diameter of your through hole.
For technical drawings and 3-D models, click on a part number.
Countersink Heads | Required Shanks | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Hole Dia. | Body Dia. | Overall Lg. | For Use On | Each | Shank Dia. | Overall Lg. | Each | ||
Uncoated High-Speed Steel | |||||||||
| 3/32" | 5/16" | 1/2" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 | 3/32" | 6" | 0000000 | 00000 |
| 1/8" | 5/16" | 1/2" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 | 1/8" | 6" | 0000000 | 0000 |
| 1/8" | 3/8" | 1/2" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 | 1/8" | 6" | 0000000 | 0000 |
| 5/32" | 5/16" | 1/2" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 | 5/32" | 6" | 0000000 | 0000 |
| 5/32" | 3/8" | 1/2" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 | 5/32" | 6" | 0000000 | 0000 |
| 5/32" | 1/2" | 1/2" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 | 5/32" | 6" | 0000000 | 0000 |
| 3/16" | 3/8" | 1/2" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 | 3/16" | 6" | 0000000 | 00000 |
| 3/16" | 1/2" | 1/2" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 | 3/16" | 6" | 0000000 | 00000 |
| 1/4" | 1/2" | 1/2" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 | 1/4" | 6" | 0000000 | 00000 |