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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Length Class Length Class |
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Jobbers' Length |
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Short Length |
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Extended Length |
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Reduced Shank Length |
For Use On For Use On |
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Shank Type Shank Type |
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Round | Reduced Round |
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Hex | Morse Taper |
Material Material |
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Bit Style Bit Style |
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Maximum Drilling Depth Maximum Drilling Depth |
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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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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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Morse Taper Number Morse Taper Number |
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Shaft Type Shaft Type |
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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.
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 | For Use On | Each | |
Inch | |||||||||
Black-Oxide High-Speed Steel | |||||||||
33/64" | 0.5156" | 6 5/8" | 4.03" | Round | 33/64" | Standard | Steel, Iron, Stainless Steel | 0000000 | 000000 |
Titanium-Nitride (TiN) Coated High-Speed Steel | |||||||||
33/64" | 0.5156" | 6 5/8" | 4.03" | Round | 33/64" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
Uncoated High-Speed Steel | |||||||||
33/64" | 0.5156" | 6 5/8" | 4.03" | Round | 33/64" | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
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.
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 | |
Inch | ||||||||||
Black-Oxide High-Speed Steel | ||||||||||
33/64" | 0.5156" | 3 7/8" | 1.6" | Round | 33/64" | Standard | ASME B94.11M | Steel, Iron, Stainless Steel | 00000000 | 000000 |
Extended-Length Drill Bits

Access hard-to-reach spots and drill deep holes.
Black-oxide drill bits produce less friction than uncoated drill bits.
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 | For Use On | Each | |
Inch | |||||||||
Black-Oxide High-Speed Steel | |||||||||
33/64" | 0.5156" | 8" | 3.97" | Round | 33/64" | Standard | Steel, Iron, Stainless Steel | 000000000 | 000000 |
33/64" | 0.5156" | 12" | 7.96" | Round | 33/64" | Standard | Steel, Iron, Stainless Steel | 0000000 | 00000 |
33/64" | 0.5156" | 18" | 11.96" | Round | 33/64" | Standard | Steel, Iron, Stainless Steel | 0000000 | 000000 |
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.
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 | |
Inch | ||||||||||
Uncoated Cobalt Steel | ||||||||||
33/64" | 0.5156" | 6 5/8" | 4" | Round | 33/64" | Split | NAS907 Type J | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
Titanium-Nitride (TiN) Coated Cobalt Steel | ||||||||||
33/64" | 0.5156" | 6 5/8" | 4.81" | Round | 33/64" | Split | NAS907 Type J | Steel, Hardened Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 000000000 | 00000 |
Titanium-Aluminum-Nitride (TiAlN) Coated Cobalt Steel | ||||||||||
33/64" | 0.5156" | 6" | 3.2" | Round | 33/64" | Split | DIN 338 | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 00000000 | 000000 |
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 | |
Inch | |||||||||
Uncoated Carbide | |||||||||
33/64" | 0.5156" | 4 3/4" | 3" | Round | 33/64" | Split | Steel, Iron, Stainless Steel, Aluminum, Brass, Bronze, Plastic | 0000000 | 0000000 |
Extended-Length Carbide-Tipped Drill Bits

Access hard-to-reach spots and drill deep holes. More wear resistant than cobalt steel and high-speed steel, these carbide-tipped bits 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.
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 | For Use On | Each | |
Inch | |||||||||
Uncoated Carbide-Tipped Steel | |||||||||
33/64" | 0.5156" | 8" | 3.98" | Round | 33/64" | Standard | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 00000000 | 000000 |
1/2" Diameter Reduced-Shank Drill Bits


The shank has a smaller diameter than the tip, allowing you to drill large holes with machines that have small-capacity chucks. Also known as Silver and Deming bits, they have a 1/2” diameter shank.
Drill bits with flats on shank have three flat sides to prevent the bit from slipping in the drill chuck.
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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Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | For Use On | Point Style | Each | |
Drill Bits | |||||||||
Inch | |||||||||
Black-Oxide High-Speed Steel | |||||||||
33/64" | 0.5156" | 6" | 2.1" | Reduced Round | 1/2" | Steel, Iron, Stainless Steel | Standard | 0000000 | 000000 |
Drill Bits with Flats on Shank | |||||||||
Inch | |||||||||
Black-Oxide High-Speed Steel | |||||||||
33/64" | 0.5156" | 6" | 2.1" | Reduced Round | 1/2" | Steel, Iron, Stainless Steel | Split | 0000000 | 00000 |
Cobalt Steel 1/2" Diameter Reduced-Shank Drill Bits

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 shank has a smaller diameter than the tip, allowing you to drill large holes with machines that have small-capacity chucks. A split point keeps the bit centered without a pilot hole. Also known as Silver and Deming bits, they have a 1/2” diameter shank.
Shank | |||||||||
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Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | For Use On | Each | |
Inch | |||||||||
Uncoated Cobalt Steel | |||||||||
33/64" | 0.5156" | 6" | 2.1" | Reduced Round | 1/2" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
High-Speed Steel Morse Taper-Shank Drill Bits

Install the Morse taper shank directly into the tapered spindle on machines such as drill presses and lathes.
For technical drawings and 3-D models, click on a part number.
Morse Taper | ||||||||||
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Drill Bit Size | Decimal Size Equivalent | No. | Dia. | Overall Lg. | Max. Drilling Dp. | Shank Type | Point Style | For Use On | Each | |
Inch | ||||||||||
Black-Oxide High-Speed Steel | ||||||||||
33/64" | 0.5156" | 2 | 0.7" | 8 1/2" | 3.85" | Morse Taper | Standard | Steel, Iron, Stainless Steel | 00000000 | 000000 |
Drill Bits for Plastic

The sharp point allows for gradual penetration to reduce friction and eliminate cracking and chipping when drilling in plastic. These bits are jobbers' length and have the rigidity and length required for most 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 | Each | |
Inch | ||||||||
Uncoated High-Speed Steel | ||||||||
33/64" | 0.5156" | 6" | 2.12" | Round | 1/2" | Standard | 00000000 | 000000 |
Drill Bits for Wire Installation

Unlike traditional wire-installing drill bits, you do not need to strip the end of the wire when using one of these bits. After drilling, insert the wire into the bit's hollow shaft and pull through the drilled hole. Also known as bell hanger bits.
For technical drawings and 3-D models, click on a part number.
Shank | ||||||||
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Drill Bit Size | Decimal Size Equivalent | Max. Drilling Dp. | Type | Size | Point Style | For Use On | Each | |
18" Overall Lg. | ||||||||
Inch | ||||||||
Black-Oxide High-Speed Steel | ||||||||
33/64" | 0.515" | 4.81" | Round | 1/2" | Standard | Steel, Iron, Stainless Steel, Aluminum, Copper, Brass, Bronze, Fiberglass, Plastic, Wood | 0000000 | 000000 |
28" Overall Lg. | ||||||||
Inch | ||||||||
Black-Oxide High-Speed Steel | ||||||||
33/64" | 0.515" | 4.81" | Round | 1/2" | Standard | Steel, Iron, Stainless Steel, Aluminum, Copper, Brass, Bronze, Fiberglass, Plastic, Wood | 0000000 | 00000 |
36" Overall Lg. | ||||||||
Inch | ||||||||
Black-Oxide High-Speed Steel | ||||||||
33/64" | 0.515" | 4.81" | Round | 1/2" | Standard | Steel, Iron, Stainless Steel, Aluminum, Copper, Brass, Bronze, Fiberglass, Plastic, Wood | 0000000 | 00000 |
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 | Lg. | Overall Lg. | Size | Decimal Size Equivalent | Point Angle | No. of Flutes | Thread Type | Pitch Dia. Limit | Hex Shank Size | Each | |
Uncoated High-Speed Steel | |||||||||||
9/16"-18 | 1 5/8" | 5 1/2" | 33/64" | 0.509" | 118° | 4 | UNF | H3 | 1/4" | 0000000 | 000000 |
Titanium Nitride (TiN) Coated High-Speed Steel | |||||||||||
9/16"-18 | 1 5/8" | 5 1/2" | 33/64" | 0.509" | 118° | 4 | UNF | H3 | 1/4" | 00000000 | 00000 |