About Drill Bits
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Drill Bit Decimal Size Equivalents
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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 | |||||||||
1/16" | 0.0625" | 3" | 1.62" | Round | 1/16" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
5/64" | 0.0781" | 3 3/4" | 1.84" | Round | 5/64" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
3/32" | 0.0938" | 4 1/4" | 2.06" | Round | 3/32" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
3/32" | 0.0938" | 8" | 5.5" | Round | 3/32" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
7/64" | 0.1094" | 4 5/8" | 2.28" | Round | 7/64" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
1/8" | 0.125" | 5 1/8" | 2.5" | Round | 1/8" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
1/8" | 0.125" | 8" | 5.5" | Round | 1/8" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
1/8" | 0.125" | 12" | 9" | Round | 1/8" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
9/64" | 0.1406" | 5 3/8" | 2.71" | Round | 9/64" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
5/32" | 0.1563" | 5 3/8" | 2.68" | Round | 5/32" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
5/32" | 0.1563" | 8" | 5.5" | Round | 5/32" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
11/64" | 0.1719" | 5 3/4" | 3.03" | Round | 11/64" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
3/16" | 0.1875" | 5 3/4" | 3" | Round | 3/16" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
3/16" | 0.1875" | 8" | 5.5" | Round | 3/16" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
3/16" | 0.1875" | 12" | 9" | Round | 3/16" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
13/64" | 0.2031" | 6" | 3.21" | Round | 13/64" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
7/32" | 0.2188" | 6" | 3.18" | Round | 7/32" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
15/64" | 0.2344" | 6 1/8" | 3.28" | Round | 15/64" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
1/4" | 0.25" | 6 1/8" | 3.25" | Round | 1/4" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
1/4" | 0.25" | 8" | 5.5" | Round | 1/4" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
1/4" | 0.25" | 12" | 9" | Round | 1/4" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
17/64" | 0.2656" | 6 1/4" | 3.34" | Round | 17/64" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
17/64" | 0.2656" | 8" | 5.5" | Round | 17/64" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
9/32" | 0.2813" | 6 1/4" | 3.31" | Round | 9/32" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
9/32" | 0.2813" | 8" | 5.5" | Round | 9/32" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
5/16" | 0.3125" | 6 3/8" | 3.37" | Round | 5/16" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
5/16" | 0.3125" | 8" | 5.5" | Round | 5/16" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
5/16" | 0.3125" | 12" | 9" | Round | 5/16" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
21/64" | 0.3281" | 6 1/2" | 3.46" | Round | 21/64" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
11/32" | 0.3438" | 6 1/2" | 3.43" | Round | 11/32" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
3/8" | 0.375" | 6 3/4" | 3.5" | Round | 3/8" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
3/8" | 0.375" | 8" | 5.5" | Round | 3/8" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
3/8" | 0.375" | 12" | 9" | Round | 3/8" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
25/64" | 0.3906" | 7" | 3.59" | Round | 25/64" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
7/16" | 0.4375" | 7 1/4" | 3.75" | Round | 7/16" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
7/16" | 0.4375" | 8" | 5.5" | Round | 7/16" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
7/16" | 0.4375" | 12" | 9" | Round | 7/16" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
1/2" | 0.5" | 7 3/4" | 3.75" | Round | 1/2" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
1/2" | 0.5" | 12" | 9" | Round | 1/2" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
17/32" | 0.5313" | 8" | 3.68" | Round | 17/32" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
9/16" | 0.5625" | 8 1/4" | 3.75" | Round | 9/16" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
9/16" | 0.5625" | 12" | 9" | Round | 9/16" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
5/8" | 0.625" | 8 3/4" | 3.62" | Round | 5/8" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
5/8" | 0.625" | 12" | 9" | Round | 5/8" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
21/32" | 0.6563" | 9" | 3.81" | Round | 21/32" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
11/16" | 0.6875" | 9 1/4" | 4" | Round | 11/16" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 000000 |
11/16" | 0.6875" | 12" | 9" | Round | 11/16" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
3/4" | 0.75" | 9 3/4" | 4.37" | Round | 3/4" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 000000 |
1" | 1" | 11" | 4.37" | Round | 1" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 000000 |
Wire Gauge | |||||||||
Uncoated Cobalt Steel | |||||||||
40 ga. | 0.098" | 4 5/8" | 2.3" | Round | 0.098" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
39 ga. | 0.0995" | 4 5/8" | 2.3" | Round | 0.0995" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
36 ga. | 0.1065" | 4 5/8" | 2.3" | Round | 0.1065" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
35 ga. | 0.11" | 5 1/8" | 2.5" | Round | 0.11" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
34 ga. | 0.111" | 5 1/8" | 2.5" | Round | 0.111" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
33 ga. | 0.113" | 5 1/8" | 2.5" | Round | 0.113" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
32 ga. | 0.116" | 5 1/8" | 2.5" | Round | 0.116" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
31 ga. | 0.12" | 5 1/8" | 2.5" | Round | 0.12" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
30 ga. | 0.1285" | 5 3/8" | 2.7" | Round | 0.1285" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
29 ga. | 0.136" | 5 3/8" | 2.7" | Round | 0.136" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
28 ga. | 0.1405" | 5 3/8" | 2.7" | Round | 0.1405" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
27 ga. | 0.144" | 5 3/8" | 2.7" | Round | 0.144" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
26 ga. | 0.147" | 5 3/8" | 2.7" | Round | 0.147" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
25 ga. | 0.1495" | 5 3/8" | 2.7" | Round | 0.1495" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
24 ga. | 0.152" | 5 3/8" | 2.7" | Round | 0.152" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
22 ga. | 0.157" | 5 3/4" | 3.1" | Round | 0.157" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
21 ga. | 0.159" | 5 3/4" | 3.1" | Round | 0.159" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
20 ga. | 0.161" | 5 3/4" | 3" | Round | 0.161" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
19 ga. | 0.166" | 5 3/4" | 3" | Round | 0.166" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
18 ga. | 0.1695" | 5 3/4" | 3" | Round | 0.1695" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
17 ga. | 0.173" | 5 3/4" | 3" | Round | 0.173" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
16 ga. | 0.177" | 5 3/4" | 3" | Round | 0.177" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
15 ga. | 0.18" | 5 3/4" | 3" | Round | 0.18" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
14 ga. | 0.182" | 5 3/4" | 3" | Round | 0.182" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
13 ga. | 0.185" | 5 3/4" | 3" | Round | 0.185" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
12 ga. | 0.189" | 6" | 3.2" | Round | 0.189" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
11 ga. | 0.191" | 6" | 3.2" | Round | 0.191" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
10 ga. | 0.1935" | 6" | 3.2" | Round | 0.1935" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
9 ga. | 0.196" | 6" | 3.23" | Round | 0.196" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
8 ga. | 0.199" | 6" | 3.22" | Round | 0.199" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
7 ga. | 0.201" | 6" | 3.22" | Round | 0.201" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
5 ga. | 0.2055" | 6" | 3.21" | Round | 0.2055" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
4 ga. | 0.209" | 6" | 3.2" | Round | 0.209" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
3 ga. | 0.213" | 6" | 3.19" | Round | 0.213" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
2 ga. | 0.221" | 6 1/8" | 3.3" | Round | 0.221" | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |