Drill Bit Decimal Size Equivalents
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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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About Drill Bits
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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. 6 | 3/32" | 1/2" | 1/4" | 2 11/16" | 1" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel, Wood | 0000000 | 00000 | 0000000 | 00000 |
| No. 10 | No. 12 | 9/64" | 1/2" | 1/4" | 3 3/32" | 1" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel, Wood | 0000000 | 0000 | 0000000 | 0000 |
| No. 4 | __ | 5/64" | 1/2" | 1/4" | 2 9/16" | 1" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel, Wood | 0000000 | 0000 | 0000000 | 0000 |
| No. 6 | No. 8 | 7/64" | 1/2" | 1/4" | 2 27/32" | 1" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel, Wood | 0000000 | 0000 | 0000000 | 0000 |
| 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 |