System of Measurement System of Measurement |
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Decimal Size Equivalent Decimal Size Equivalent |
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Length Class Length Class |
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Jobbers' Length |
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Extended Length |
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Reduced Shank Length |
Material Material |
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For Use On For Use On |
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Shank Type Shank Type |
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Round | Reduced Round |
Flute Direction Flute Direction |
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Right Hand |
Individual/Set Individual/Set |
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Bit Style Bit Style |
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![]() | Spiral Flute |
![]() | Parabolic Spiral Flute |
Maximum Drilling Depth Maximum Drilling Depth | Show |
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Maximum Drilling Depth Maximum Drilling Depth | Hide |
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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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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Specifications Met Specifications Met |
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Flute Style Flute Style |
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![]() | Straight |
Drill Bit Decimal Size Equivalents
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About Drill Bits
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About Reamers
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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.
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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Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | Specifications Met | For Use On | Each | |
Wire Gauge | ||||||||||
Black-Oxide High-Speed Steel | ||||||||||
6 ga | 0.204" | 3 3/4" | 2.19" | Round | 0.204" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 00000000 | 00000 |
5 ga | 0.2055" | 3 3/4" | 2.19" | Round | 0.2055" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 00000000 | 0000 |
Titanium-Nitride (TiN) Coated High-Speed Steel | ||||||||||
6 ga | 0.204" | 3 3/4" | 2.19" | Round | 0.204" | Split | NAS907 Type B | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 000000000 | 0000 |
5 ga | 0.2055" | 3 3/4" | 2.19" | Round | 0.2055" | Split | NAS907 Type B | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 000000000 | 0000 |
Titanium-Aluminum-Nitride (TiAlN) Coated High-Speed Steel | ||||||||||
6 ga | 0.204" | 3 3/4" | 2.19" | Round | 0.204" | Split | NAS907 Type B | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 00000000 | 0000 |
5 ga | 0.2055" | 3 3/4" | 2.19" | Round | 0.2055" | Split | NAS907 Type B | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 00000000 | 0000 |
Uncoated High-Speed Steel | ||||||||||
6 ga | 0.204" | 3 3/4" | 2.19" | Round | 0.204" | Standard | __ | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 00000000 | 0000 |
5 ga | 0.2055" | 3 3/4" | 2.19" | Round | 0.2055" | Standard | __ | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 00000000 | 0000 |
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. | |||||||||
Wire Gauge | |||||||||
Black-Oxide High-Speed Steel | |||||||||
6 ga | 0.204" | 2.19" | Round | 0.204" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
5 ga | 0.2055" | 2.19" | Round | 0.2055" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
12" Overall Lg. | |||||||||
Wire Gauge | |||||||||
Black-Oxide High-Speed Steel | |||||||||
6 ga | 0.204" | 2.19" | Round | 0.204" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 00000000 | 00000 |
5 ga | 0.2055" | 2.19" | Round | 0.2055" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 00000000 | 00000 |
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.
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—Spiral Flute | |||||||||
Uncoated High-Speed Steel | |||||||||
6 ga | 0.204" | 3 3/4" | 2.19" | Round | 0.204" | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 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.
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 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | Specifications Met | For Use On | Each | |
Wire Gauge | ||||||||||
Uncoated Cobalt Steel | ||||||||||
6 ga | 0.204" | 3 3/4" | 2.19" | Round | 0.204" | Split | NAS907 Type J | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
5 ga | 0.2055" | 3 3/4" | 2.19" | Round | 0.2055" | Split | NAS907 Type J | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 00000000 | 0000 |
Titanium-Nitride (TiN) Coated Cobalt Steel | ||||||||||
17 ga | 0.173" | 3 3/8" | 2.19" | Round | 0.173" | Split | NAS907 Type J | Steel, Hardened Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 000000000 | 0000 |
16 ga | 0.177" | 3 3/8" | 2.19" | Round | 0.177" | Split | NAS907 Type J | Steel, Hardened Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 000000000 | 0000 |
15 ga | 0.18" | 3 3/8" | 2.19" | Round | 0.18" | Split | NAS907 Type J | Steel, Hardened Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 000000000 | 0000 |
14 ga | 0.182" | 3 3/8" | 2.19" | Round | 0.182" | Split | NAS907 Type J | Steel, Hardened Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 000000000 | 0000 |
Chip-Clearing Carbide Drill Bits


The parabolic spiral flutes lift chips out of the hole, reducing clogging and improving coolant flow. For the highest accuracy and longest tool life, these solid-carbide bits 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.
Titanium-nitride (TiN) coated drill bits last longer and can drill at higher speeds than uncoated drill bits.
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—Parabolic Spiral Flute | |||||||||
Uncoated Carbide | |||||||||
9 ga | 0.196" | 3 21/32" | 2.19" | Round | 0.1961" | Standard | Steel, Iron, Stainless Steel, Aluminum, Brass, Bronze, Plastic | 00000000 | 000000 |
8 ga | 0.199" | 3 21/32" | 2.19" | Round | 0.1992" | Standard | Steel, Iron, Stainless Steel, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
7 ga | 0.201" | 3 21/32" | 2.19" | Round | 0.2012" | Standard | Steel, Iron, Stainless Steel, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
Titanium-Nitride (TiN) Coated Carbide | |||||||||
9 ga | 0.196" | 3 21/32" | 2.19" | Round | 0.1961" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 00000000 | 00000 |
8 ga | 0.199" | 3 21/32" | 2.19" | Round | 0.1992" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 00000000 | 00000 |
7 ga | 0.201" | 3 21/32" | 2.19" | Round | 0.2012" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 0000000 | 00000 |
1/4" 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.
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 | |
Inch | |||||||||
Black-Oxide High-Speed Steel | |||||||||
5/16" | 0.3125" | 3 7/8" | 2.19" | Reduced Round | 1/4" | Standard | Steel, Iron, Stainless Steel | 0000000 | 00000 |
Round-Shank Drill Reamers

Drill and finish holes in a single pass with these dual-purpose tools. The tapered tip gradually pierces your material to reduce friction, and the straight flutes make clean cuts without chipping or peeling the edge of the hole. Made from solid carbide, these drill reamers are strong and heat resistant. The flutes stay sharp even when cutting abrasive materials such as carbon fiber, fiberglass, and graphite. Use them in drill presses or other machines—carbide is brittle, and will break if used to drill by hand.
Dia. | Lg. | ||||||||||
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Reamer Size | Reamer | Shank | Max. Drilling Dp. | Flute | Overall | Number of Flutes | Flute Style | Cutting Dia. Tolerance | For Use On | Each | |
Carbide | |||||||||||
Inch | |||||||||||
3/8" | 0.3750" | 3/8" | 2.19" | 2 3/16" | 4" | 4 | Straight | 0" to 0.0005" | Carbon Fiber, Fiberglass, Graphite | 0000000 | 0000000 |
Wire Gauge | |||||||||||
2 ga | 0.2210" | 0.221" | 2.19" | 2 3/16" | 4" | 4 | Straight | 0" to 0.0005" | Carbon Fiber, Fiberglass, Graphite | 0000000 | 000000 |