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.
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 | Pkg. | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | Specifications Met | For Use On | Each | Pkg. Qty. | Pkg. | ||
Inch | |||||||||||||
Black-Oxide High-Speed Steel | |||||||||||||
21/64" | 0.3281" | 4 5/8" | 2.82" | Round | 21/64" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 00000000 | 00000 | 6 | 00000000 | 000000 |
Titanium-Nitride (TiN) Coated High-Speed Steel | |||||||||||||
21/64" | 0.3281" | 4 5/8" | 2.82" | Round | 21/64" | Split | NAS907 Type B | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 000000000 | 00000 | 6 | 000000000 | 00000 |
Titanium-Aluminum-Nitride (TiAlN) Coated High-Speed Steel | |||||||||||||
21/64" | 0.3281" | 4 5/8" | 2.82" | Round | 21/64" | Split | NAS907 Type B | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 0000000 | 00000 | __ | 000000 | 00 |
Uncoated High-Speed Steel | |||||||||||||
21/64" | 0.3281" | 4 5/8" | 2.82" | Round | 21/64" | Standard | __ | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 0000 | 6 | 00000000 | 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.
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 | Pkg. | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | Specifications Met | For Use On | Each | Pkg. Qty. | Pkg. | ||
Inch | |||||||||||||
Black-Oxide High-Speed Steel | |||||||||||||
21/64" | 0.3281" | 3" | 1.19" | Round | 21/64" | Split | ASME B94.11M | Steel, Iron, Stainless Steel | 0000000 | 00000 | 6 | 00000000 | 000000 |
Titanium-Nitride (TiN) Coated High-Speed Steel | |||||||||||||
21/64" | 0.3281" | 3" | 1.19" | Round | 21/64" | Split | __ | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 | 3 | 0000000 | 00000 |
Uncoated High-Speed Steel | |||||||||||||
21/64" | 0.3281" | 3" | 1.19" | Round | 21/64" | Standard | ASME B94.11M | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 00000000 | 0000 | __ | 000000 | 00 |
Extended-Length Drill Bits
Access hard-to-reach spots and drill deep holes.
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.
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 | Each | |
Inch | |||||||||
Black-Oxide High-Speed Steel | |||||||||
21/64" | 0.3281" | 6 1/2" | 3.63" | Round | 21/64" | Standard | Steel, Iron, Stainless Steel | 000000000 | 000000 |
21/64" | 0.3281" | 8" | 5" | Round | 21/64" | Standard | Steel, Iron, Stainless Steel | 00000000 | 00000 |
Titanium-Nitride (TiN) Coated High-Speed Steel | |||||||||
21/64" | 0.3281" | 6 1/2" | 4.13" | Round | 21/64" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 000000000 | 00000 |
Uncoated High-Speed Steel | |||||||||
21/64" | 0.3281" | 6 1/2" | 4.13" | Round | 21/64" | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
21/64" | 0.3281" | 12" | 8.34" | Round | 21/64" | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
21/64" | 0.3281" | 18" | 12.34" | Round | 21/64" | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
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 | |||||||||
---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equivalent | Max. Drilling Depth | Type | Size | Point Style | Specifications Met | For Use On | Each | |
6" Overall Lg. | |||||||||
Inch | |||||||||
Black-Oxide High-Speed Steel | |||||||||
21/64" | 0.3281" | 2.8" | Round | 21/64" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 000000 |
12" Overall Lg. | |||||||||
Inch | |||||||||
Black-Oxide High-Speed Steel | |||||||||
21/64" | 0.3281" | 2.8" | Round | 21/64" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
Maintenance-Length Drill Bits
Also known as mechanics’ bits, these are shorter and more rigid than jobbers' bits but longer than short‐length bits. A split point keeps the bit centered without a pilot hole.
Drill bits with flats on shank have three flat sides to prevent the bit from slipping in the drill chuck.
For technical drawings and 3-D models, click on a part number.
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.
Parabolic spiral flute drill bits have wider flutes for more efficient chip evacuation than spiral-flute 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 | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | For Use On | Specifications Met | Each | |
Inch—Parabolic Spiral Flute | ||||||||||
Black-Oxide High-Speed Steel | ||||||||||
21/64" | 0.3281" | 4 5/8" | 2.65" | Round | 21/64" | Split | Steel, Iron, Stainless Steel | __ | 00000000 | 000000 |
Titanium-Nitride (TiN) Coated High-Speed Steel | ||||||||||
21/64" | 0.3281" | 4 5/8" | 2.65" | Round | 21/64" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | __ | 00000000 | 00000 |
Uncoated High-Speed Steel | ||||||||||
21/64" | 0.3281" | 4 5/8" | 2.65" | Round | 21/64" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | DIN 338 | 0000000 | 00000 |
Inch—Spiral Flute | ||||||||||
Black-Oxide High-Speed Steel | ||||||||||
21/64" | 0.3281" | 4 5/8" | 2.28" | Round | 21/64" | Split | Steel, Iron, Stainless Steel | __ | 00000000 | 00000 |
Uncoated High-Speed Steel | ||||||||||
21/64" | 0.3281" | 4 5/8" | 2.82" | Round | 21/64" | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | __ | 00000000 | 0000 |
Extended-Length Chip-Clearing Drill Bits
Access hard-to-reach spots and drill deep holes. Parabolic spiral flutes lift chips out of the hole, reducing clogging and improving coolant flow. The 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 | Type | Size | Point Style | For Use On | Max. Drilling Dp. | Each | |
8" Overall Lg. | ||||||||
Inch—Parabolic Spiral Flute | ||||||||
Uncoated High-Speed Steel | ||||||||
21/64" | 0.3281" | Round | 21/64" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 5.34" | 00000000 | 000000 |
12" Overall Lg. | ||||||||
Inch—Parabolic Spiral Flute | ||||||||
Uncoated High-Speed Steel | ||||||||
21/64" | 0.3281" | Round | 21/64" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 8.34" | 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.
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 | |
Inch | ||||||||||
Uncoated Cobalt Steel | ||||||||||
21/64" | 0.3281" | 4 5/8" | 2.8" | Round | 21/64" | Split | NAS907 Type J | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
Titanium-Nitride (TiN) Coated Cobalt Steel | ||||||||||
21/64" | 0.3281" | 4 5/8" | 3.31" | Round | 21/64" | Split | NAS907 Type J | Steel, Hardened Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 000000000 | 00000 |
Titanium-Aluminum-Nitride (TiAlN) Coated Cobalt Steel | ||||||||||
21/64" | 0.3281" | 4 5/8" | 2.46" | Round | 21/64" | Split | DIN 338 | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 00000000 | 00000 |
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 | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | For Use On | Specifications Met | Each | |
Inch | ||||||||||
Black-Oxide Cobalt Steel | ||||||||||
21/64" | 0.3281" | 4 5/8" | 1.2" | Round | 21/64" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium | NAS907 Type D | 00000000 | 000000 |
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 | Pkg. | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | For Use On | Each | Pkg. Qty. | Pkg. | ||
Inch | ||||||||||||
Uncoated Cobalt Steel | ||||||||||||
21/64" | 0.3281" | 3" | 1.19" | Round | 21/64" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 00000000 | 000000 | 6 | 000000000 | 000000 |
Titanium-Nitride (TiN) Coated Cobalt Steel | ||||||||||||
21/64" | 0.3281" | 3" | 1.19" | Round | 21/64" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 0000000 | 00000 | __ | 000000 | 00 |
Extended-Length Cobalt Steel Drill Bits
Access hard-to-reach spots and drill deep holes. 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 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 | For Use On | Each | |
Inch | |||||||||
Uncoated Cobalt Steel | |||||||||
21/64" | 0.3281" | 6 1/2" | 3.46" | Round | 21/64" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 000000 |
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.
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 | |||||||||
---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | For Use On | Each | |
Inch—Parabolic Spiral Flute | |||||||||
Uncoated Cobalt Steel | |||||||||
21/64" | 0.3281" | 4 1/2" | 2.8" | Round | 21/64" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 000000000 | 000000 |
Titanium-Nitride (TiN) Coated Cobalt Steel | |||||||||
21/64" | 0.3281" | 4 1/2" | 2.8" | Round | 21/64" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 0000000 | 00000 |
Carbide Drill Bits
These jobbers'-length bits have the rigidity and length required for most applications. 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. The four-facet point keeps the bit centered without a pilot hole. These bits require rigid toolholding to prevent breakage and should not be used in hand-held drilling applications.
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.
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 | Each | |
Inch | |||||||||
Uncoated Carbide | |||||||||
21/64" | 0.3281" | 4" | 2" | Round | 21/64" | Four Facet | Steel, Iron, Stainless Steel, Aluminum, Brass, Bronze, Plastic | 0000000 | 000000 |
Titanium-Nitride (TiN) Coated Carbide | |||||||||
21/64" | 0.3281" | 4" | 2" | Round | 21/64" | Four Facet | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 00000000 | 00000 |
Titanium-Aluminum-Nitride (TiAlN) Coated Carbide | |||||||||
21/64" | 0.3281" | 4" | 2" | Round | 21/64" | Four Facet | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 0000000 | 00000 |
Short-Length Carbide 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 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 applications.They have either a four-facet or split point to keep 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 | For Use On | Each | |
Inch | |||||||||
Uncoated Carbide | |||||||||
21/64" | 0.3281" | 2 3/4" | 1" | Round | 21/64" | Four Facet | Steel, Iron, Stainless Steel, Aluminum, Brass, Bronze, Plastic | 0000000 | 000000 |
Short-Flute Extended-Length Carbide-Tipped Drill Bits
The short flutes provide increased rigidity for drilling straighter holes and the long length lets you access hard-to-reach spots. 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. A split point keeps the bit centered without a pilot hole.
For technical drawings and 3-D models, click on a part number.
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 | |||||||||
Inch | |||||||||
Uncoated Carbide-Tipped Steel | |||||||||
21/64" | 0.3281" | 4 5/8" | Round | 21/64" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 2.8" | 118° | 0000000 | 000000 |
Split Point | |||||||||
Inch | |||||||||
Uncoated Carbide-Tipped Steel | |||||||||
21/64" | 0.3281" | 4 3/4" | Round | 21/64" | Steel, Iron, Titanium, Aluminum, Brass, Bronze, Plastic | 2.8" | 135° | 00000000 | 00000 |
Cobalt Steel Hex-Shank Drill Bits
In addition to resisting heat and wear better than high-speed steel drill bits, these can also run up to 25% faster and have a longer tool life. Insert them into power screwdrivers, impact drivers, and other tools that accept hex shanks. The flat surfaces on the hex shank allow tool chucks to grip these bits more securely than those with a round shank. A split point keeps the bits centered without a pilot hole.
Shank | |||||||||
---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equivalent | Overall Length | Maximum Drilling Depth | Type | Size | Point Style | For Use On | Each | |
Uncoated Cobalt Steel | |||||||||
21/64" | 0.3281" | 4 5/8" | 1.31" | Hex | 21/64" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
Carbide-Tipped Drill Bits for Hardened Steel
The straight flutes and notched point withstand the heavy pressure necessary to penetrate hard steel. These carbide-tipped bits maintain their sharp edges when drilling abrasive material. Because they aren’t as brittle as solid carbide bits, they can be used in less rigid setups, such as a hand-held drill. 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 | |||||||||
---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | For Max. Hardness | Each | |
Inch | |||||||||
Uncoated Carbide-Tipped Steel | |||||||||
21/64" | 0.3281" | 4 3/4" | 1.31" | Round | 21/64" | Notched | Rockwell C60 | 0000000 | 000000 |
Drill Bits for Carbon Fiber, Fiberglass, and Graphite
These jobbers'-length bits have the rigidity and length required for most applications. They are designed to make clean holes in abrasive material. Their point keeps the bit centered without a pilot hole.
Uncoated drill bits have three drill points that make clean holes in fiber-reinforced composites without fraying or delaminating the material.
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 | Each | |
Inch | ||||||||
Uncoated Carbide | ||||||||
21/64" | 0.3281" | 4" | 2" | Round | 21/64" | Brad | 0000000 | 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 | ||||||||
---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | Each | |
Inch | ||||||||
Uncoated High-Speed Steel | ||||||||
21/64" | 0.3281" | 4 5/8" | 3.31" | Round | 21/64" | Standard | 00000000 | 000000 |
Drill Bits for Aluminum, Brass, and Bronze
Because softer metal, like aluminum, brass, and bronze, can clog a bit, the flutes on these bits lift chips out of the hole. Also known as slow-spiral drill bits. They 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 | Each | ||||||||
---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | 1-5 | 6-Up | |
Inch—Spiral Flute | |||||||||
Uncoated High-Speed Steel | |||||||||
21/64" | 0.3281" | 4 5/8" | 2.65" | Round | 21/64" | Standard | 00000000 | 000000 | 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.
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 | Each | |
Inch | |||||||||
Uncoated High-Speed Steel | |||||||||
21/64" | 0.3281" | 4 5/8" | 2.65" | Round | 21/64" | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 000000 |