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System of Measurement System of Measurement |
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For Use On For Use On |
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Material Material |
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Finish Finish |
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Length Class Length Class |
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![]() | Jobbers' Length |
Shank Type Shank Type |
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![]() | Round |
Specifications Met Specifications Met |
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Flute Direction Flute Direction |
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Right Hand |
Individual/Set Individual/Set |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Point Angle Point Angle |
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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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Shank Size Shank Size |
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Bit Style Bit Style |
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![]() | Spiral Flute |
Overall Length Overall Length |
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Point Style Point Style |
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Split |
Decimal Size Equivalent Decimal Size Equivalent |
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Drill Bit Decimal Size Equivalents
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About Drill Bits
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Short-Flute Cobalt Steel Drill Bits

The short flutes on these jobbers'-length bits provide increased rigidity for drilling straighter holes. 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. A 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 | Specifications Met | Each | |
Inch | ||||||||||
Black-Oxide Cobalt Steel | ||||||||||
5/16" | 0.3125" | 4 1/2" | 1.16" | Round | 5/16" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium | NAS907 Type D | 00000000 | 000000 |