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About Drill Bits
Compare material, finish, length class, and decimal size equivalents.
High-Speed Steel Multidiameter Drill Bits
Black Oxide
Titanium Nitride (TiN)
Uncoated
Steps with progressively larger diameters let you drill a range of sizes with one bit. Also known as step drills.
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 drill bits and black-oxide drill bits.
For technical drawings and 3-D models, click on a part number.
Shank | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Drill Bit Size | Decimal Size Equivalent | No. of Sizes | Overall Lg. | For Max. Material Thick. | Type | Size | Point Style | For Use On | Each | |
Inch | ||||||||||
Black-Oxide High-Speed Steel | ||||||||||
| 1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2" | 0.125", 0.1563", 0.1875", 0.2188", 0.25", 0.2813", 0.3125", 0.3438", 0.375", 0.4063", 0.4375", 0.4688", 0.5" | 13 | 3 1/8" | 1/8" | 3-Flat | 1/4" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Nickel, Aluminum, Brass, Bronze, Plastic | 0000000 | 000000 |
| 3/16", 1/4", 5/16", 3/8", 7/16", 1/2" | 0.1875", 0.25", 0.3125", 0.375", 0.4375", 0.5" | 6 | 3 1/8" | 1/8" | 3-Flat | 1/4" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Nickel, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
| 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8" | 0.1875", 0.25", 0.3125", 0.375", 0.4375", 0.5", 0.5625", 0.625", 0.6875", 0.75", 0.8125", 0.875" | 12 | 3" | 1/8" | 3-Flat | 3/8" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Nickel, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
| 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4" | 0.25", 0.3125", 0.375", 0.4375", 0.5", 0.5625", 0.625", 0.6875", 0.75" | 9 | 2 5/8" | 1/8" | 3-Flat | 3/8" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Nickel, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
| 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1 1/8", 1 1/4", 1 3/8" | 0.25", 0.375", 0.5", 0.625", 0.75", 0.875", 1", 1.125", 1.25", 1.375" | 10 | 3 1/8" | 1/8" | 3-Flat | 3/8" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Nickel, Aluminum, Brass, Bronze, Plastic | 0000000 | 000000 |
| 3/8", 1/2" | 0.375", 0.5" | 2 | 2" | 1/8" | 3-Flat | 1/4" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Nickel, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
| 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1" | 0.5", 0.5625", 0.625", 0.6875", 0.75", 0.8125", 0.875", 0.9375", 1" | 9 | 3 1/4" | 1/8" | 3-Flat | 1/2" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Nickel, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
| 7/8", 1", 1 1/8", 1 1/4", 1 3/8" | 0.875", 1", 1.125", 1.25", 1.375" | 5 | 3" | 1/8" | 3-Flat | 3/8" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Nickel, Aluminum, Brass, Bronze, Plastic | 0000000 | 000000 |
Titanium-Nitride (TiN) Coated High-Speed Steel | ||||||||||
| 1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2" | 0.125", 0.1563", 0.1875", 0.2188", 0.25", 0.2813", 0.3125", 0.3438", 0.375", 0.4063", 0.4375", 0.4688", 0.5" | 13 | 3 1/4" | 1/8" | Hex | 1/4" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
| 3/16", 1/4", 5/16", 3/8", 7/16", 1/2" | 0.1875", 0.25", 0.3125", 0.375", 0.4375", 0.5" | 6 | 3 1/4" | 3/8" | Hex | 1/4" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
| 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8" | 0.1875", 0.25", 0.3125", 0.375", 0.4375", 0.5", 0.5625", 0.625", 0.6875", 0.75", 0.8125", 0.875" | 12 | 3" | 1/8" | Hex | 3/8" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
| 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4" | 0.25", 0.3125", 0.375", 0.4375", 0.5", 0.5625", 0.625", 0.6875", 0.75" | 9 | 2 5/8" | 1/8" | Hex | 3/8" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
| 1/4", 7/8", 1 1/8" | 0.25", 0.875", 1.125" | 3 | 3" | 5/32" | Hex | 3/8" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 00000000 | 000000 |
| 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1" | 0.5625", 0.625", 0.6875", 0.75", 0.8125", 0.875", 0.9375", 1" | 8 | 2 7/8" | 1/8" | Hex | 3/8" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
Uncoated High-Speed Steel | ||||||||||
| 1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2" | 0.125", 0.1563", 0.1875", 0.2188", 0.25", 0.2813", 0.3125", 0.3438", 0.375", 0.4063", 0.4375", 0.4688", 0.5" | 13 | 3 1/4" | 1/8" | Hex | 1/4" | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
| 3/16", 1/4", 5/16", 3/8", 7/16", 1/2" | 0.1875", 0.25", 0.3125", 0.375", 0.4375", 0.5" | 6 | 3 3/8" | 3/8" | Hex | 1/4" | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
| 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8" | 0.1875", 0.25", 0.3125", 0.375", 0.4375", 0.5", 0.5625", 0.625", 0.6875", 0.75", 0.8125", 0.875" | 12 | 3" | 1/8" | Hex | 3/8" | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
| 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4" | 0.25", 0.3125", 0.375", 0.4375", 0.5", 0.5625", 0.625", 0.6875", 0.75" | 9 | 2 5/8" | 1/8" | Hex | 3/8" | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
| 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1 1/8", 1 1/4", 1 3/8" | 0.25", 0.375", 0.5", 0.625", 0.75", 0.875", 1", 1.125", 1.25", 1.375" | 10 | 3 1/8" | 1/8" | Hex | 3/8" | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 000000 |
| 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1" | 0.5625", 0.625", 0.6875", 0.75", 0.8125", 0.875", 0.9375", 1" | 8 | 2 1/2" | 1/8" | Hex | 3/8" | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
| 13/16", 7/8", 15/16", 1", 1 1/16", 1 1/8", 1 3/16", 1 1/4", 1 5/16", 1 3/8" | 0.8125", 0.875", 0.9375", 1", 1.0625", 1.125", 1.1875", 1.25", 1.3125", 1.375" | 10 | 2 1/8" | 1/8" | Hex | 3/8" | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 000000 |
| 7/8", 1 1/8" | 0.875", 1.125" | 2 | 3" | 1/8" | Hex | 3/8" | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
Metric | ||||||||||
Black-Oxide High-Speed Steel | ||||||||||
| 4.0 mm, 5.0 mm, 6.0 mm, 6.5 mm, 8.0 mm, 9.0 mm, 10.0 mm, 11.0 mm, 12.0 mm | 0.1575", 0.1969", 0.2362", 0.2559", 0.315", 0.3543", 0.3937", 0.4331", 0.4724" | 9 | 65mm | 2mm | 3-Flat | 6.4mm | Standard | Steel, Hardened Steel, Tool Steel, Iron, Nickel, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
| 4.0 mm, 6.0 mm, 8.0 mm, 10.0 mm, 12.0 mm, 14.0 mm, 16.0 mm, 18.0 mm, 20.0 mm | 0.1575", 0.2362", 0.315", 0.3937", 0.4724", 0.5512", 0.6299", 0.7087", 0.7874" | 9 | 65mm | 2mm | 3-Flat | 6.4mm | Standard | Steel, Hardened Steel, Tool Steel, Iron, Nickel, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
| 6.0 mm, 8.0 mm, 10.0 mm, 12.0 mm, 14.0 mm, 16.0 mm, 18.0 mm, 20.0 mm, 22.0 mm, 24.0 mm, 26.0 mm, 28.0 mm, 30.0 mm, 32.0 mm | 0.2362", 0.315", 0.3937", 0.4724", 0.5512", 0.6299", 0.7087", 0.7874", 0.8661", 0.9449", 1.0236", 1.1024", 1.1811", 1.2598", 1.378" | 15 | 89mm | 2mm | 3-Flat | 9.53mm | Standard | Steel, Hardened Steel, Tool Steel, Iron, Nickel, Aluminum, Brass, Bronze, Plastic | 0000000 | 000000 |
Titanium-Nitride (TiN) Coated High-Speed Steel | ||||||||||
| 4.0 mm, 6.0 mm, 8.0 mm, 10.0 mm, 12.0 mm, 14.0 mm, 16.0 mm, 18.0 mm, 20.0 mm, 22.0 mm | 0.1575", 0.2362", 0.315", 0.3937", 0.4724", 0.5512", 0.6299", 0.7087", 0.7874", 0.8661" | 10 | 76mm | 5mm | Hex | 10mm | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
| 5.0 mm, 7.5 mm, 10.0 mm, 13.0 mm, 16.0 mm, 19.0 mm, 21.0 mm, 23.0 mm, 26.0 mm, 29.0 mm, 31.0 mm, 33.0 mm, 35.0 mm | 0.1968", 0.2953", 0.3937", 0.5118", 0.6299", 0.748", 0.8268", 0.9055", 1.0236", 1.1417", 1.2205", 1.2992", 1.378" | 13 | 79mm | 4mm | Hex | 11.1mm | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 00000000 | 000000 |
Uncoated High-Speed Steel | ||||||||||
| 4.0 mm, 6.0 mm, 8.0 mm, 10.0 mm, 12.0 mm, 14.0 mm, 16.0 mm, 18.0 mm, 20.0 mm, 22.0 mm | 0.1575", 0.2362", 0.315", 0.3937", 0.4724", 0.5512", 0.6299", 0.7087", 0.7874", 0.8661" | 10 | 76mm | 5mm | Hex | 10mm | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
| 5.0 mm, 7.5 mm, 10.0 mm, 13.0 mm, 16.0 mm, 19.0 mm, 21.0 mm, 23.0 mm, 26.0 mm, 29.0 mm, 31.0 mm, 33.0 mm, 35.0 mm | 0.1968", 0.2953", 0.3937", 0.5118", 0.6299", 0.748", 0.8268", 0.9055", 1.0236", 1.1417", 1.2205", 1.2992", 1.378" | 13 | 79mm | 4mm | Hex | 11.1mm | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
| 6.0 mm, 8.0 mm, 10.0 mm, 12.0 mm, 14.0 mm, 16.0 mm, 18.0 mm | 0.2362", 0.315", 0.3937", 0.4724", 0.5512", 0.6299", 0.7087" | 7 | 64mm | 5mm | Hex | 10mm | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 00000000 | 00000 |
Cobalt Steel Multidiameter Drill Bits
With better heat and wear resistance than high-speed steel, cobalt steel bits can run up to 25% faster and have a longer tool life. Steps with progressively larger diameters let you drill a range of sizes with one bit. Also known as step drills.
For technical drawings and 3-D models, click on a part number.
Shank | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Drill Bit Size | Decimal Size Equivalent | No. of Sizes | Overall Lg. | For Max. Material Thick. | Type | Size | Point Style | For Use On | Each | |
Inch | ||||||||||
Uncoated Cobalt Steel | ||||||||||
| 1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2" | 0.125", 0.1563", 0.1875", 0.2188", 0.25", 0.2813", 0.3125", 0.3438", 0.375", 0.4063", 0.4375", 0.4688", 0.5" | 13 | 3 1/4" | 1/8" | Hex | 1/4" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
| 3/16", 1/4", 5/16", 3/8", 7/16", 1/2" | 0.1875", 0.25", 0.3125", 0.375", 0.4375", 0.5" | 6 | 3 3/8" | 3/8" | Hex | 1/4" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
| 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8" | 0.1875", 0.25", 0.3125", 0.375", 0.4375", 0.5", 0.5625", 0.625", 0.6875", 0.75", 0.8125", 0.875" | 12 | 3" | 1/8" | Hex | 3/8" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
| 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4" | 0.25", 0.3125", 0.375", 0.4375", 0.5", 0.5625", 0.625", 0.6875", 0.75" | 9 | 2 5/8" | 1/8" | Hex | 3/8" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
| 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1" | 0.5625", 0.625", 0.6875", 0.75", 0.8125", 0.875", 0.9375", 1" | 8 | 2 1/2" | 1/8" | Hex | 7/16" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
| 7/8", 1 1/8" | 0.875", 1.125" | 2 | 3" | 1/8" | Hex | 7/16" | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
Any-Diameter Drill Bits
A
B
Place a washer (not included) with an ID of the desired hole size over the bit and it acts as a stop to prevent the bit from drilling a larger hole.
Style A do not require a pilot hole.
Style B require a 1 29/64” pilot hole to start drilling.
For technical drawings and 3-D models, click on a part number.
Shank | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Style | Drill Bit Size | Size Decimal Equivalent | Overall Lg. | For Max. Material Thick. | Max. Drilling Dp. | Type | Size | Point Style | For Use On | Each | |
Inch | |||||||||||
Black-Oxide High-Speed Steel | |||||||||||
| A | 1/8"-9/16" | 0.125"-0.5625" | 2 1/4" | 1/16" | 0.08" | 3-Flat | 1/4" | Standard | Steel, Iron, Stainless Steel | 0000000 | 000000 |
| A | 1/4"-13/16" | 0.25"-0.8125" | 2 3/4" | 1/16" | 0.08" | 3-Flat | 3/8" | Standard | Steel, Iron, Stainless Steel | 0000000 | 00000 |
| A | 5/8"-1 3/16" | 0.625"-1.1875" | 3" | 1/16" | 0.08" | 3-Flat | 3/8" | Standard | Steel, Iron, Stainless Steel | 0000000 | 00000 |
| A | 1"-1 5/8" | 1"-1.625" | 3 1/4" | 1/16" | 0.08" | 3-Flat | 3/8" | Standard | Steel, Iron, Stainless Steel | 0000000 | 000000 |
| B | 1 1/2"-2 1/16" | 1.5"-2.0625" | 2 3/4" | 1/16" | 0.08" | 3-Flat | 3/8" | __ | Steel, Iron, Stainless Steel | 0000000 | 000000 |
Multidiameter Drill Bit Sets
Steps with progressively larger diameters let you drill a range of sizes with one bit. Also known as step drills.
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.
| Number of Pieces | Drill Bit Sizes Included | Shank Type | Point Style | For Use On | Each | |
Inch | ||||||
|---|---|---|---|---|---|---|
Uncoated High-Speed Steel | ||||||
| 3 | 1 each in sizes 1/8"-1/2", 3/16"-1/2", 1/4"-3/4" | Hex | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 000000 |
| 4 | 1 each in sizes 1/8"-1/2", 3/16"-1/2", 3/16"-7/8", 13/16"-1 3/8" | Hex | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 0000000 | 000000 |
Titanium-Nitride (TiN) Coated High-Speed Steel | ||||||
| 3 | 1 each in sizes 1/8"-1/2", 3/16"-1/2", 1/4"-3/4" | Hex | Standard | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 00000000 | 000000 |
Countersinking Drill Bits for Taps
Also called subland drill bits, these bits countersink as they drill to prepare holes for tapping. The 90° countersink angle guides the tap into the hole. The drill bit diameter will not change after sharpening.
For technical drawings and 3-D models, click on a part number.
Dia. | Lg. | 90° Countersink Angle | |||||||
|---|---|---|---|---|---|---|---|---|---|
| For Tap Thread Size  | Body | Step | Step | Overall | Shank Dia. | Point Angle | For Use On | Each | |
Uncoated High-Speed Steel | |||||||||
2 Flute | |||||||||
| 6-32 | 0.156" | 0.107" | 5/16" | 3 1/8" | 0.156" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 000000 |
| 8-32 | 0.188" | 0.136" | 3/8" | 3 1/2" | 0.188" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
| 10-32 | 0.219" | 0.159" | 1/2" | 3 3/4" | 0.219" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
| 1/4"-20 | 0.281" | 0.201" | 1/2" | 4 1/4" | 0.281" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
| 1/4"-28 | 0.313" | 0.213" | 5/8" | 4 1/2" | 0.313" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
| 5/16"-18 | 0.438" | 0.257" | 11/16" | 5 1/2" | 0.438" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
| 5/16"-24 | 0.375" | 0.272" | 11/16" | 5" | 0.375" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
| 3/8"-16 | 0.438" | 0.313" | 3/4" | 5 1/2" | 0.438" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
| 7/16"-14 | 0.500" | 0.368" | 3/4" | 6" | 0.5" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
Countersinking Drill Bits for Screws
Also known as step drill bits, these bits countersink as they drill. The 82° countersink angle is compatible with the profile of flat- and oval-head inch screws. After multiple sharpenings, the drill bit diameter may become smaller.
For technical drawings and 3-D models, click on a part number.
Dia. | Lg. | 82° Countersink Angle | |||||||
|---|---|---|---|---|---|---|---|---|---|
| For Screw Size | Body | Step | Step | Overall | Shank Dia. | Point Angle | For Use On | Each | |
Uncoated High-Speed Steel | |||||||||
2 Flute | |||||||||
| No. 6 | 0.281" | 0.142" | 1/2" | 4 1/4" | 0.2813" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| No. 8 | 0.332" | 0.169" | 1/2" | 4 3/4" | 0.3320" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| No. 10 | 0.386" | 0.196" | 5/8" | 5 1/8" | 0.3860" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| 1/4" | 0.500" | 0.257" | 11/16" | 6" | 0.5000" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| 5/16" | 0.625" | 0.320" | 3/4" | 7 1/8" | 0.6250" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| 3/8" | 0.750" | 0.383" | 7/8" | 5" | 0.7500" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| 7/16" | 0.813" | 0.446" | 1" | 5 1/4" | 0.8125" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 1/2" | 0.875" | 0.510" | 1" | 5 1/2" | 0.8750" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
Oversized Long-Life Counterboring Drill Bits
These counterbores are often used when screw holes in sheets or layers are misaligned. Also known as subland drill bits, they last longer than standard counterboring drill bits because the diameter stays the same after sharpening. They drill and counterbore at the same time. After drilling and counterboring, tap the hole and install your fastener. The diameters account for the 1/32” or 1/64” oversized diameter rating.
For technical drawings and 3-D models, click on a part number.
Dia. | Lg. | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Screw Size | Body | Step | Step | Overall | Number of Flutes | Point Angle | For Use On | Each | |
Uncoated High-Speed Steel | |||||||||
1/64" Oversized | |||||||||
| No. 6 | 0.234" | 0.146" | 5/16" | 2 7/16" | 2 | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 000000 |
| No. 8 | 0.281" | 0.175" | 3/8" | 4 1/4" | 2 | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
| No. 10 | 0.328" | 0.206" | 5/8" | 4 5/8" | 2 | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
| No. 10 | 0.344" | 0.206" | 1/2" | 4 3/4" | 2 | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
| 1/4" | 0.391" | 0.266" | 1/2" | 5 1/8" | 2 | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
| 1/4" | 0.406" | 0.266" | 1/2" | 5 1/4" | 2 | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
| 3/8" | 0.578" | 0.391" | 3/4" | 4 1/8" | 2 | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
1/32" Oversized | |||||||||
| 1/4" | 0.406" | 0.281" | 1/2" | 5 1/4" | 2 | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
| 5/16" | 0.500" | 0.344" | 5/8" | 6" | 2 | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
| 3/8" | 0.594" | 0.406" | 3/4" | 4 1/8" | 2 | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
Long-Life Counterboring Drill Bits
Also known as subland drill bits, these last longer than standard counterboring drill bits because the diameter stays the same after sharpening. They drill and counterbore at the same time. After drilling and counterboring, tap the hole and install your fastener.
For technical drawings and 3-D models, click on a part number.
Dia. | Lg. | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Screw Size | Body | Step | Step | Overall | Number of Flutes | Point Angle | For Use On | Each | |
Uncoated High-Speed Steel | |||||||||
| No. 6 | 0.228" | 0.141" | 5/16" | 3 7/8" | 2 | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 000000 |
| No. 8 | 0.272" | 0.164" | 3/8" | 2 11/16" | 2 | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
| No. 10 | 0.313" | 0.190" | 1/2" | 2 13/16" | 2 | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
| 1/4" | 0.375" | 0.250" | 1/2" | 5" | 2 | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
| 5/16" | 0.469" | 0.313" | 5/8" | 3 5/8" | 2 | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
Counterboring Drill Bits
Often called step drill bits, these drill and counterbore holes at the same time. After drilling and counterboring, tap the hole and install your fastener. The body diameter may decrease after multiple sharpenings.
For technical drawings and 3-D models, click on a part number.
Dia. | Lg. | |||||||
|---|---|---|---|---|---|---|---|---|
| For Screw Size | Body | Step | Step | Overall | Point Angle | For Use On | Each | |
Uncoated High-Speed Steel | ||||||||
| No. 6 | 0.250" | 0.15" | 1/2" | 4" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| No. 8 | 0.290" | 0.178" | 1/2" | 4 1/4" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| No. 10 | 0.332" | 0.204" | 5/8" | 4 3/4" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| 1/4" | 0.406" | 0.281" | 11/16" | 5 1/4" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| 5/16" | 0.500" | 0.344" | 3/4" | 6" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| 3/8" | 0.594" | 0.406" | 7/8" | 7 1/8" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| 7/16" | 0.688" | 0.469" | 1" | 7 5/8" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| 1/2" | 0.781" | 0.531" | 1" | 9 7/8" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |