System of Measurement System of Measurement |
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Drill Bit Size Drill Bit Size | Show |
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Drill Bit Size Drill Bit Size | Hide |
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Decimal Size Equivalent Decimal Size Equivalent |
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Length Class Length Class |
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![]() | Jobbers' Length |
![]() | Short Length |
For Use On For Use On |
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Bit Style Bit Style |
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![]() | Spiral Flute |
![]() | Parabolic Spiral Flute |
Finish Finish |
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Material Material |
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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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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Individual/Set Individual/Set |
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Flute Direction Flute Direction |
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Right Hand |
Shank Size Shank Size |
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Thread Pitch Thread Pitch |
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Thread Size Thread Size |
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Thread Type Thread Type |
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About Tool Steel
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Drill Bit Decimal Size Equivalents
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About Drill Bits
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Drill Bits




These jobbers'-length bits have the rigidity and length required for most applications.
Black-oxide and black-and-gold-oxide drill bits produce less friction than uncoated drill bits.
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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Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | Specifications Met | For Use On | Each | |
Metric | ||||||||||
Black-Oxide High-Speed Steel | ||||||||||
7.2 mm | 0.2835" | 109mm | 54.6mm | Round | 7.2mm | Standard | DIN 338 | Steel, Iron, Stainless Steel | 00000000 | 00000 |
Black-and-Gold Oxide High-Speed Steel | ||||||||||
7.2 mm | 0.2835" | 108mm | 71.4mm | Round | 7.2mm | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 000000000 | 0000 |
Short-Length Drill Bits

Also known as screw-machine and stub-length bits, these provide maximum rigidity for drilling straighter holes than jobbers'- and maintenance-length drill bits.
Black-oxide drill bits produce less friction than uncoated drill bits.
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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Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | Specifications Met | For Use On | Each | |
Metric | ||||||||||
Black-Oxide High-Speed Steel | ||||||||||
7.2 mm | 0.2835" | 74mm | 34mm | Round | 7.2mm | Split | DIN 1897 | Steel, Iron, Stainless Steel | 000000000 | 00000 |
Chip-Clearing Cobalt Steel Drill Bits

The parabolic spiral flutes lift chips out of the hole, reducing clogging and improving coolant flow. 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. All are jobbers’ length so they have the rigidity and length required for most applications. A split point keeps the bit centered without a pilot hole.
Shank | ||||||||||
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Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | Specifications Met | For Use On | Each | |
Metric—Parabolic Spiral Flute | ||||||||||
Uncoated Cobalt Steel | ||||||||||
7.2 mm | 0.2835" | 109mm | 69mm | Round | 7.2mm | Split | DIN 338 | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
Hex Shank Taps for Drills and Screwdrivers

Insert these taps directly into drills, power screwdrivers, and other tools that accept a 1/4" hex shank. They're made of high-speed steel and are for use on most metal and plastic. All have a plug chamfer with 3-5 chamfered cutting threads, so they're suitable for start-to-finish tapping. When using them to tap closed-end holes, be sure to leave sufficient space at the bottom for chips to accumulate.
For technical drawings and 3-D models, click on a part number.
Thread | Drill Bit | Plug Chamfer | |||||||
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Size | Pitch, mm | Lg. | Overall Lg. | Size | Decimal Size Equivalent | No. of Flutes | Hex Shank Size | Each | |
Uncoated High-Speed Steel | |||||||||
M8 | 0.75 | 3/4" | 1 9/16" | 7.2 mm | 0.2834" | 4 | 1/4" | 0000000 | 000000 |
Hardened Undersized High-Speed M2 Tool Steel Rods

- Yield Strength: Not Rated
- Hardness: Rockwell C60 (Very Hard)
These rods, also known as drill blanks, have an undersized diameter for machining your own jobbers'-length drill bits. They're hardened for increased abrasion and impact resistance. M2 tool steel offers a nice balance of wear resistance and machinability. It has a high molybdenum content, which allows it to maintain sharp cutting edges even at elevated temperatures.
For technical drawings and 3-D models, click on a part number.
Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
Dia. | Dia. Tolerance | Drill Bit Size | Lg. | Mechanical Finish | Straightness Tolerance | Each | |
7.2mm | -0.0050mm to 0.0000mm | 7.2 mm | 4 1/4" | Precision Ground | 0.012" per ft. | 00000000 | 00000 |