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
![](/prerenderstable/mvPRE/contents/gfx/imagecache/281/28145a48p1-a02b-digital@halfx_637072598591983606.png?ver=imagenotfound)
A small drill point at the tip lets you use the same tool for drilling and countersinking 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.
Dia. | |||||||
---|---|---|---|---|---|---|---|
For Screw Size | Body | Shank | Drill Tip | Overall Lg. | For Use On | Each | |
82° Countersink Angle | |||||||
Uncoated High-Speed Steel | |||||||
2 Flute | |||||||
No. 5 | 5/16" | 1/4" | 0.127" | 1 3/4" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 000000 |
No. 6 | 5/16" | 1/4" | 0.140" | 1 3/4" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
No. 8 | 7/16" | 1/4" | 0.166" | 2" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
No. 10 | 7/16" | 1/4" | 0.192" | 2" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
No. 12 | 7/16" | 1/4" | 0.220" | 2" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
1/4" | 1/2" | 3/8" | 0.252" | 2 3/8" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
5/16" | 5/8" | 3/8" | 0.315" | 2 5/8" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
3/8" | 3/4" | 1/2" | 0.378" | 3" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
90° Countersink Angle | |||||||
Uncoated High-Speed Steel | |||||||
2 Flute | |||||||
3 mm | 6.350mm | 6.35mm | 3.100mm | 44.44mm | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
4 mm | 8.200mm | 6.35mm | 4.100mm | 44.44mm | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
5 mm | 11.100mm | 7.93mm | 5.100mm | 50.79mm | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
6 mm | 12.700mm | 7.93mm | 6.100mm | 50.79mm | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
8 mm | 17.450mm | 11.11mm | 8.100mm | 66.66mm | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
10 mm | 20.630mm | 12.7mm | 10.100mm | 76.19mm | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
12 mm | 25.400mm | 15.87mm | 12.100mm | 76.19mm | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |