System of Measurement System of Measurement |
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Decimal Size Equivalent Decimal Size Equivalent |
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Material Material |
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Length Class Length Class |
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| Jobbers' Length |
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| Extended Length |
For Use On For Use On |
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Point Style Point Style |
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| Split |
Shank Type Shank Type |
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 | Round |
Point Angle Point Angle |
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Flute Direction Flute Direction |
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| Right Hand |
Finish Finish |
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Bit Style Bit Style |
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 | Spiral Flute |
Individual/Set Individual/Set |
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Maximum Drilling Depth Maximum Drilling Depth | Show |
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Maximum Drilling Depth Maximum Drilling Depth | Hide |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement)  |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Specifications Met Specifications Met |
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Drill Bit Decimal Size Equivalents
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About Drill Bits
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Short-Flute Extended-Length Drill Bits
The short flutes on these bits provide increased rigidity for drilling straighter holes and the long length lets you access hard-to-reach spots.
Drill bits with a split point keep centered without a pilot hole.
For technical drawings and 3-D models, click on a part number.
Shank | |||||||||
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| Size | Decimal Size Equivalent | Max. Drilling Depth | Type | Size | Point Style | Specifications Met | For Use On | Each | |
6" Overall Lg. | |||||||||
Inch | |||||||||
Black-Oxide High-Speed Steel | |||||||||
| 5/16" | 0.3125" | 2.7" | Round | 5/16" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 000000 |
12" Overall Lg. | |||||||||
Inch | |||||||||
Black-Oxide High-Speed Steel | |||||||||
| 5/16" | 0.3125" | 2.7" | Round | 5/16" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
Cobalt Steel Drill Bits
These jobbers'-length bits have the rigidity and length required for most applications. Made of cobalt steel, which has better heat and wear resistance than high-speed steel, they can run up to 25% faster and have a longer tool life.
Drill bits with a split point keep centered without a pilot hole.
For technical drawings and 3-D models, click on a part number.
Shank | Each | |||||||||
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| Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | Specifications Met | For Use On | Each | |
Inch | ||||||||||
Uncoated Cobalt Steel | ||||||||||
| 5/16" | 0.3125" | 4 1/2" | 2.7" | Round | 5/16" | Split | NAS907 Type J | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
Extended-Length Cobalt Steel Drill Bits
Access hard-to-reach spots and drill deep holes. With better heat and wear resistance than high-speed steel, these cobalt steel bits can run up to 25% faster and have a longer tool life. The split point keeps the bit centered without a pilot hole.
For technical drawings and 3-D models, click on a part number.
Shank | |||||||||
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| Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | For Use On | Each | |
Wire Gauge | |||||||||
Uncoated Cobalt Steel | |||||||||
| 30 ga | 0.1285" | 5 3/8" | 2.7" | Round | 0.1285" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 000000 |
| 29 ga | 0.136" | 5 3/8" | 2.7" | Round | 0.136" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
| 28 ga | 0.1405" | 5 3/8" | 2.7" | Round | 0.1405" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
| 27 ga | 0.144" | 5 3/8" | 2.7" | Round | 0.144" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
| 26 ga | 0.147" | 5 3/8" | 2.7" | Round | 0.147" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
| 25 ga | 0.1495" | 5 3/8" | 2.7" | Round | 0.1495" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
| 24 ga | 0.152" | 5 3/8" | 2.7" | Round | 0.152" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
Carbide-Tipped Drill Bits
These jobbers'-length bits have the rigidity and length required for most applications. Made of carbide-tipped steel, which has better wear resistance than high-speed steel and cobalt steel, they maintain a sharper, harder edge at high temperatures for excellent performance on abrasive material, such as plastic. Because they aren’t as brittle as solid carbide bits, they can be used in less rigid setups, such as a hand-held drill.
Drill bits with a split point keep centered without a pilot hole.
Drill bits with 135° point angle produce smaller chips than 118° point to prevent clogging.
For technical drawings and 3-D models, click on a part number.
Shank | Split Point | ||||||||
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| Size | Decimal Size Equivalent | Overall Lg. | Type | Size | For Use On | Max. Drilling Dp. | Point Angle | Each | |
Letter | |||||||||
Uncoated Carbide-Tipped Steel | |||||||||
| O | 0.316" | 4 1/2" | Round | 0.316" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 2.7" | 135° | 000000000 | 000000 |