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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For Use On For Use On |
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Length Class Length Class |
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Jobbers' Length |
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Short Length |
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Extended Length |
Finish Finish |
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Material Material |
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Flute Direction Flute Direction |
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Right Hand |
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Maximum Drilling Depth Maximum Drilling Depth |
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Individual/Set Individual/Set |
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Bit Style Bit Style |
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Shank Size Shank Size |
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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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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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Thread Size Thread Size |
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Thread Pitch Thread Pitch |
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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.
Titanium-nitride (TiN) coated drill bits last longer and can drill at higher speeds than uncoated and oxide-coated 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 | Pkg. | |||||||||||
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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 | Pkg. Qty. | Pkg. | ||
Metric | |||||||||||||
Black-Oxide High-Speed Steel | |||||||||||||
4.2 mm | 0.1654" | 75mm | 34.6mm | Round | 4.2mm | Standard | DIN 338 | Steel, Iron, Stainless Steel | 0000000 | 00000 | 12 | 00000000 | 000000 |
Black-and-Gold Oxide High-Speed Steel | |||||||||||||
4.2 mm | 0.1654" | 83mm | 49.2mm | Round | 4.2mm | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 000000000 | 0000 | 10 | 00000000 | 00000 |
Titanium-Nitride (TiN) Coated High-Speed Steel | |||||||||||||
4.2 mm | 0.1654" | 75mm | 36.7mm | Round | 4.2mm | Standard | DIN 338 | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 0000000 | 0000 | __ | 000000 | 00 |
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.
Titanium-nitride (TiN) coated drill bits last longer and can drill at higher speeds than uncoated and black-oxide 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 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
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 | ||||||||||
4.2 mm | 0.1654" | 55mm | 13.5mm | Round | 4.2mm | Split | DIN 1897 | Steel, Iron, Stainless Steel | 00000000 | 00000 |
Titanium-Nitride (TiN) Coated High-Speed Steel | ||||||||||
4.2 mm | 0.1654" | 56mm | 22.1mm | Round | 4.2mm | Split | DIN 1897 | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 000000 | 0000 |
Extended-Length Drill Bits


Access hard-to-reach spots and drill deep holes.
Black-oxide drill bits produce less friction than uncoated drill bits.
Shank | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | For Use On | Specifications Met | Each | |
Metric | ||||||||||
Black-Oxide High-Speed Steel | ||||||||||
4.2 mm | 0.1654" | 119mm | 78mm | Round | 4.2mm | Standard | Steel, Iron | DIN 340 | 000000000 | 000000 |
Uncoated High-Speed Steel | ||||||||||
4.2 mm | 0.1654" | 119mm | 69.3mm | Round | 4.2mm | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | DIN 340 | 00000000 | 0000 |
Chip-Clearing Drill Bits

These jobbers'-length bits have the rigidity and length required for most applications. The flutes are designed to lift chips out of the hole, reducing clogging and improving coolant flow.
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 | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | For Use On | Specifications Met | Each | |
Metric—Spiral Flute | ||||||||||
Black-Oxide High-Speed Steel | ||||||||||
4.2 mm | 0.1654" | 75mm | 34.6mm | Round | 4.2mm | Split | Steel, Iron, Stainless Steel | DIN 338 | 00000000 | 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.
Titanium-nitride (TiN) coated drill bits last longer and can drill at higher speeds than uncoated drill bits.
Titanium-aluminum-nitride (TiAlN) coated drill bits are the most wear and temperature resistant for the longest life and highest drilling speeds.
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 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | Specifications Met | For Use On | Each | |
Metric | ||||||||||
Titanium-Nitride (TiN) Coated Cobalt Steel | ||||||||||
4.2 mm | 0.1654" | 75mm | 42.9mm | Round | 4.2mm | Split | DIN 338 | Steel, Hardened Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 0000000 | 00000 |
Titanium-Aluminum-Nitride (TiAlN) Coated Cobalt Steel | ||||||||||
4.2 mm | 0.1654" | 75mm | 36.7mm | Round | 4.2mm | Split | DIN 338 | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 00000000 | 00000 |
Gold-Oxide Cobalt Steel | ||||||||||
4.2 mm | 0.1654" | 75mm | 34.6mm | Round | 4.2mm | Split | NAS907 Type J | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 0000 |
Short-Length Cobalt Steel Drill Bits


Also known as screw-machine and stub-length bits, these provide maximum rigidity for drilling straighter holes than jobbers'-length drill bits. 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.
Titanium-nitride (TiN) coated drill bits last longer and can drill at higher speeds 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 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | Specifications Met | For Use On | Each | |
Metric | ||||||||||
Uncoated Cobalt Steel | ||||||||||
4.2 mm | 0.1654" | 56mm | 13.7mm | Round | 4.2mm | Split | DIN 1897 | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
Titanium-Nitride (TiN) Coated Cobalt Steel | ||||||||||
4.2 mm | 0.1654" | 56mm | 13.7mm | Round | 4.2mm | Split | DIN 1897 | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 00000000 | 0000 |
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.
For technical drawings and 3-D models, click on a part number.
Shank | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
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 | ||||||||||
4.2 mm | 0.1654" | 76mm | 43mm | Round | 4.2mm | Split | DIN 338 | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
Smooth-Finish Carbide Drill Bits

Three cutting edges instead of the typical two enable these bits to drill holes with a smoother finish than other bits. Made of solid carbide for the highest accuracy and longest tool life, they are harder, stronger, and more wear resistant than high-speed steel, cobalt steel, and carbide-tipped bits. They retain a sharp, hard edge at high temperatures for the best performance on hard and abrasive material. These bits require rigid toolholding to prevent breakage and should not be used in hand-held drilling. 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.
For technical drawings and 3-D models, click on a part number.
Shank | |||||||||
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Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Shank Size | Point Style | For Use On | Each | |
Metric | |||||||||
Uncoated Carbide | |||||||||
4.2 mm | 0.1654" | 55mm | 21.9mm | Round | 4.2mm | Split | Steel, Iron, Stainless Steel, Aluminum, Brass, Bronze, Plastic | 0000000 | 000000 |
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 | |||||||||
---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Type | Size | For Use On | Max. Drilling Dp. | Point Angle | Each | |
Standard Point | |||||||||
Metric | |||||||||
Uncoated Carbide-Tipped Steel | |||||||||
4.2 mm | 0.1654" | 89mm | Round | 4.2mm | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 47mm | 118° | 00000000 | 000000 |
Split Point | |||||||||
Metric | |||||||||
Uncoated Carbide-Tipped Steel | |||||||||
4.2 mm | 0.1654" | 83mm | Round | 4.2mm | Iron, Aluminum, Brass, Bronze, Plastic | 54mm | 135° | 00000000 | 00000 |
Cobalt Steel Drill Bits for Stainless Steel and Nickel

Cobalt steel and a titanium aluminum nitride (TiAlN) coating provide the heat and wear resistance necessary for drilling in stainless steel and nickel alloys. These bits have parabolic spiral flutes, which lift chips out of the hole to reduce clogging and improve coolant flow. They are jobbers' length and have the rigidity and length required for most hand-held drilling and machine tool applications.
For technical drawings and 3-D models, click on a part number.
Shank | |||||||||
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Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | Specifications Met | Each | |
Metric—Parabolic Spiral Flute | |||||||||
Titanium-Aluminum-Nitride (TiAlN) Coated Cobalt Steel | |||||||||
4.2 mm | 0.1654" | 75mm | 43mm | Round | 4.2mm | Split | DIN 338 | 0000000 | 000000 |
High-Speed Steel Left-Hand Drill Bits

Also known as reverse-flute bits, the flutes spiral in the opposite direction of other bits. Use in counterclockwise drilling applications such as removing broken screws. These bits are jobbers' length and 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.
For technical drawings and 3-D models, click on a part number.
Shank | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | For Use On | Specifications Met | Each | |
Metric | ||||||||||
Black-Oxide High-Speed Steel | ||||||||||
4.2 mm | 0.1654" | 75mm | 34.6mm | Round | 4.2mm | Standard | Steel, Iron, Stainless Steel | DIN 338 | 00000000 | 000000 |
Hex Shank Combination Drill Bits/Taps for Drills and Screwdrivers

With a drill bit point to drive into the workpiece, these taps can drill and tap holes in a single step. A 1/4" hex shank connects them directly to tools such as drills and power screwdrivers. They're made of high-speed steel and are for use on most metal and plastic.
Their spiral flutes keep chips clear by drawing them back toward the tap and out of the hole. All have a plug chamfer with 3-5 chamfered cutting threads, so they're suitable for start-to-finish tapping.
Uncoated taps are strong enough for most tapping jobs but have the shortest tool life. Titanium Nitride (TiN) coated taps resist heat and wear better than uncoated taps, letting them last up to twice as long.
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 | Point Angle | No. of Flutes | Pitch Dia. Limit | Hex Shank Size | Each | |
Uncoated High-Speed Steel | |||||||||||
M5 | 0.8 | 5/8" | 3 3/8" | 4.2 mm | 0.1653" | 118° | 2 | D4 | 1/4" | 0000000 | 000000 |
Titanium Nitride (TiN) Coated High-Speed Steel | |||||||||||
M5 | 0.8 | 5/8" | 3 3/8" | 4.2 mm | 0.1653" | 118° | 2 | D4 | 1/4" | 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 | |||||||||
M5 | 0.8 | 5/8" | 1 7/16" | 4.2 mm | 0.1653" | 3 | 1/4" | 0000000 | 000000 |
Combination Drill Bit/Taps


Drill holes and cut threads without switching tools. Made of high-speed steel, these taps are for use on most metal and plastic. The square shank is compatible with tap holders for drill presses and milling machines. All have a plug chamfer with 3-5 chamfered cutting threads, so they're suitable for start-to-finish tapping.
Taps with spiral flutes keep chips clear by drawing them back toward the tap and out of the hole.
Uncoated taps are strong enough for most tapping jobs but have a shorter tool life. Titanium nitride (TiN) coated taps resist heat and wear better than uncoated taps, letting them last up to twice as long.
For technical drawings and 3-D models, click on a part number.
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 | |
4.2mm | -0.0050mm to 0.0000mm | 4.2 mm | 3 1/4" | Precision Ground | 0.012" per ft. | 00000000 | 00000 |