System of Measurement System of Measurement |
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Drill Bit Size Drill Bit Size |
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Material Material |
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Finish Finish |
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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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| Short Length | |
Bit Style Bit Style |
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| Straight Flute | |
Point Style Point Style |
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| Split |
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| Four Facet |
Number of Flutes Number of Flutes |
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![]() | 2 |
Shank Type Shank Type |
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| Round | |
Point Angle Point Angle |
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Shank Material Shank Material |
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Shank Size Shank Size |
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For Maximum Hardness For Maximum Hardness |
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Individual/Set Individual/Set |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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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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Drill Bit Decimal Size Equivalents
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About Drill Bits
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Carbide Drill Bits for Hardened Steel
Harder, stronger, and more wear resistant than carbide-tipped steel, solid-carbide bits maintain their sharp edges longer. They require rigid toolholding to prevent breakage and should not be used in hand-held drilling applications. The straight flutes withstand the heavy pressure necessary to penetrate hard steel. A four-facet or split point keeps the bit centered without a pilot hole. These bits are short length, also known as screw machine or stub length, which provides maximum rigidity for drilling straighter holes than jobbers'-length drill bits.
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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| Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | No. of Flutes | For Max. Hardness | Point Style | Each | |
Uncoated Carbide | ||||||||||
Inch | ||||||||||
Carbide Shank | ||||||||||
| 1/16" | 0.0625" | 1 1/2" | 0.3" | Round | 1/16" | 2 | Rockwell C45 | Four Facet | 0000000 | 000000 |
| 5/64" | 0.0781" | 2" | 0.4" | Round | 5/64" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 3/32" | 0.0938" | 2" | 0.4" | Round | 3/32" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 7/64" | 0.1094" | 2 1/4" | 0.5" | Round | 7/64" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 1/8" | 0.125" | 2 1/4" | 0.5" | Round | 1/8" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 9/64" | 0.1406" | 2 1/2" | 0.5" | Round | 9/64" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 5/32" | 0.1563" | 2 1/2" | 0.6" | Round | 5/32" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 11/64" | 0.1719" | 2 1/2" | 0.6" | Round | 11/64" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 3/16" | 0.1875" | 2 1/2" | 0.6" | Round | 3/16" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 13/64" | 0.2031" | 2 1/2" | 0.8" | Round | 13/64" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 7/32" | 0.2188" | 2 1/2" | 0.8" | Round | 7/32" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 15/64" | 0.2344" | 2 1/2" | 0.8" | Round | 15/64" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 1/4" | 0.25" | 2 1/2" | 0.8" | Round | 1/4" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 17/64" | 0.2656" | 2 1/2" | 0.8" | Round | 17/64" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 9/32" | 0.2813" | 2 1/2" | 0.8" | Round | 9/32" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 5/16" | 0.3125" | 2 1/2" | 1" | Round | 5/16" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 3/8" | 0.375" | 3" | 1" | Round | 3/8" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 7/16" | 0.4375" | 3" | 1" | Round | 7/16" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 1/2" | 0.5" | 3" | 1" | Round | 1/2" | 2 | Rockwell C45 | Four Facet | 0000000 | 000000 |
Wire Gauge | ||||||||||
Carbide Shank | ||||||||||
| 60 ga. | 0.04" | 1 1/2" | 0.3" | Round | 0.04" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 59 ga. | 0.041" | 1 1/2" | 0.3" | Round | 0.041" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 58 ga. | 0.042" | 1 1/2" | 0.3" | Round | 0.042" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 57 ga. | 0.043" | 1 1/2" | 0.3" | Round | 0.043" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 56 ga. | 0.0465" | 1 1/2" | 0.3" | Round | 0.0465" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 55 ga. | 0.052" | 1 1/2" | 0.3" | Round | 0.052" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 54 ga. | 0.055" | 1 1/2" | 0.3" | Round | 0.055" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 53 ga. | 0.0595" | 1 1/2" | 0.3" | Round | 0.0595" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 52 ga. | 0.0635" | 1 1/2" | 0.3" | Round | 0.0635" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 51 ga. | 0.067" | 1 1/2" | 0.3" | Round | 0.067" | 2 | Rockwell C45 | Four Facet | 000000 | 00000 |
| 50 ga. | 0.07" | 2" | 0.3" | Round | 0.07" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 49 ga. | 0.073" | 2" | 0.3" | Round | 0.073" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 48 ga. | 0.076" | 2" | 0.4" | Round | 0.076" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 47 ga. | 0.0785" | 2" | 0.4" | Round | 0.0785" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 46 ga. | 0.081" | 2" | 0.4" | Round | 0.081" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 45 ga. | 0.082" | 2" | 0.4" | Round | 0.082" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 44 ga. | 0.086" | 2" | 0.4" | Round | 0.086" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 43 ga. | 0.089" | 2" | 0.4" | Round | 0.089" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 42 ga. | 0.0935" | 2" | 0.4" | Round | 0.0935" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 41 ga. | 0.096" | 2" | 0.4" | Round | 0.096" | 2 | Rockwell C45 | Four Facet | 000000 | 00000 |
| 40 ga. | 0.098" | 2" | 0.4" | Round | 0.098" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 39 ga. | 0.0995" | 2 1/4" | 0.5" | Round | 0.0995" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 38 ga. | 0.1015" | 2 1/4" | 0.5" | Round | 0.1015" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 37 ga. | 0.104" | 2 1/4" | 0.5" | Round | 0.104" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 36 ga. | 0.1065" | 2 1/4" | 0.5" | Round | 0.1065" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 35 ga. | 0.11" | 2 1/4" | 0.5" | Round | 0.11" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 34 ga. | 0.111" | 2 1/4" | 0.5" | Round | 0.111" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 33 ga. | 0.113" | 2 1/4" | 0.5" | Round | 0.113" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 32 ga. | 0.116" | 2 1/4" | 0.5" | Round | 0.116" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 31 ga. | 0.12" | 2 1/4" | 0.5" | Round | 0.12" | 2 | Rockwell C45 | Four Facet | 000000 | 00000 |
| 30 ga. | 0.1285" | 2 1/4" | 0.5" | Round | 0.1285" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 29 ga. | 0.136" | 2 1/2" | 0.5" | Round | 0.136" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 28 ga. | 0.1405" | 2 1/2" | 0.5" | Round | 0.1405" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 27 ga. | 0.144" | 2 1/2" | 0.5" | Round | 0.144" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 26 ga. | 0.147" | 2 1/2" | 0.5" | Round | 0.147" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 25 ga. | 0.1495" | 2 1/2" | 0.5" | Round | 0.1495" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 24 ga. | 0.152" | 2 1/2" | 0.5" | Round | 0.152" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 23 ga. | 0.154" | 2 1/2" | 0.5" | Round | 0.154" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 22 ga. | 0.157" | 2 1/2" | 0.6" | Round | 0.157" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 21 ga. | 0.159" | 2 1/2" | 0.6" | Round | 0.159" | 2 | Rockwell C45 | Four Facet | 000000 | 00000 |
| 20 ga. | 0.161" | 2 1/2" | 0.6" | Round | 0.161" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 19 ga. | 0.166" | 2 1/2" | 0.6" | Round | 0.166" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 18 ga. | 0.1695" | 2 1/2" | 0.6" | Round | 0.1695" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 17 ga. | 0.173" | 2 1/2" | 0.6" | Round | 0.173" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 16 ga. | 0.177" | 2 1/2" | 0.6" | Round | 0.177" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 15 ga. | 0.18" | 2 1/2" | 0.6" | Round | 0.18" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 14 ga. | 0.182" | 2 1/2" | 0.6" | Round | 0.182" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 13 ga. | 0.185" | 2 1/2" | 0.6" | Round | 0.185" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 12 ga. | 0.189" | 2 1/2" | 0.6" | Round | 0.189" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 11 ga. | 0.191" | 2 1/2" | 0.6" | Round | 0.191" | 2 | Rockwell C45 | Four Facet | 000000 | 00000 |
| 10 ga. | 0.1935" | 2 1/2" | 0.6" | Round | 0.1935" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 9 ga. | 0.196" | 2 1/2" | 0.8" | Round | 0.196" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 8 ga. | 0.199" | 2 1/2" | 0.8" | Round | 0.199" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 7 ga. | 0.201" | 2 1/2" | 0.8" | Round | 0.201" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 6 ga. | 0.204" | 2 1/2" | 0.8" | Round | 0.204" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 5 ga. | 0.2055" | 2 1/2" | 0.8" | Round | 0.2055" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 4 ga. | 0.209" | 2 1/2" | 0.8" | Round | 0.209" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 3 ga. | 0.213" | 2 1/2" | 0.8" | Round | 0.213" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 2 ga. | 0.221" | 2 1/2" | 0.8" | Round | 0.221" | 2 | Rockwell C45 | Four Facet | 0000000 | 00000 |
| 1 ga. | 0.228" | 2 1/2" | 0.8" | Round | 0.228" | 2 | Rockwell C45 | Four Facet | 000000 | 00000 |
Letter | ||||||||||
Carbide Shank | ||||||||||
| A | 0.234" | 2 1/2" | 0.8" | Round | 0.234" | 2 | Rockwell C45 | Four Facet | 00000000 | 00000 |
| B | 0.238" | 2 1/2" | 0.8" | Round | 0.238" | 2 | Rockwell C45 | Four Facet | 00000000 | 00000 |




























