Drill Bit Decimal Size Equivalents
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About Drill Bits
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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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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 | |||||||||
3/64" | 0.0469" | 0.7" | Round | 3/64" | Standard | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
1/16" | 0.0625" | 0.8" | Round | 1/16" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
5/64" | 0.0781" | 0.9" | Round | 5/64" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
3/32" | 0.0938" | 1.1" | Round | 3/32" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
7/64" | 0.1094" | 1.3" | Round | 7/64" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
1/8" | 0.125" | 1.4" | Round | 1/8" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
9/64" | 0.1406" | 1.5" | Round | 9/64" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
5/32" | 0.1563" | 1.8" | Round | 5/32" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
11/64" | 0.1719" | 1.9" | Round | 11/64" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
3/16" | 0.1875" | 2" | Round | 3/16" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
13/64" | 0.2031" | 2.1" | Round | 13/64" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
7/32" | 0.2188" | 2.2" | Round | 7/32" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
15/64" | 0.2344" | 2.3" | Round | 15/64" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
1/4" | 0.25" | 2.4" | Round | 1/4" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
17/64" | 0.2656" | 2.5" | Round | 17/64" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
9/32" | 0.2813" | 2.5" | Round | 9/32" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
19/64" | 0.2969" | 2.6" | Round | 19/64" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
5/16" | 0.3125" | 2.7" | Round | 5/16" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
21/64" | 0.3281" | 2.8" | Round | 21/64" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
11/32" | 0.3438" | 2.9" | Round | 11/32" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
23/64" | 0.3594" | 3" | Round | 23/64" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
3/8" | 0.375" | 3.1" | Round | 3/8" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
25/64" | 0.3906" | 3.1" | Round | 25/64" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
13/32" | 0.4063" | 3.3" | Round | 13/32" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
27/64" | 0.4219" | 3.3" | Round | 27/64" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
7/16" | 0.4375" | 3.4" | Round | 7/16" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
29/64" | 0.4531" | 3.5" | Round | 29/64" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
15/32" | 0.4688" | 3.6" | Round | 15/32" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
31/64" | 0.4844" | 3.6" | Round | 31/64" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
1/2" | 0.5" | 3.8" | Round | 1/2" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
Wire Gauge | |||||||||
Black-Oxide High-Speed Steel | |||||||||
60 ga. | 0.04" | 0.62" | Round | 0.04" | Standard | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
59 ga. | 0.041" | 0.62" | Round | 0.041" | Standard | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
58 ga. | 0.042" | 0.62" | Round | 0.042" | Standard | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
57 ga. | 0.043" | 0.68" | Round | 0.043" | Standard | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
56 ga. | 0.0465" | 0.68" | Round | 0.0465" | Standard | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
55 ga. | 0.052" | 0.79" | Round | 0.052" | Standard | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
54 ga. | 0.055" | 0.79" | Round | 0.055" | Standard | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
53 ga. | 0.0595" | 0.78" | Round | 0.0595" | Standard | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 00000 |
52 ga. | 0.0635" | 0.78" | Round | 0.0635" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
51 ga. | 0.067" | 0.9" | Round | 0.067" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
50 ga. | 0.07" | 0.89" | Round | 0.07" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
49 ga. | 0.073" | 0.89" | Round | 0.073" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
48 ga. | 0.076" | 0.88" | Round | 0.076" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
47 ga. | 0.0785" | 0.88" | Round | 0.0785" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
46 ga. | 0.081" | 1" | Round | 0.081" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
45 ga. | 0.082" | 1" | Round | 0.082" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
44 ga. | 0.086" | 0.99" | Round | 0.086" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
43 ga. | 0.089" | 1.11" | Round | 0.089" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
42 ga. | 0.0935" | 1.11" | Round | 0.0935" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
41 ga. | 0.096" | 1.23" | Round | 0.096" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
40 ga. | 0.098" | 1.22" | Round | 0.098" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
39 ga. | 0.0995" | 1.22" | Round | 0.0995" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
38 ga. | 0.1015" | 1.28" | Round | 0.1015" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
37 ga. | 0.104" | 1.28" | Round | 0.104" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
36 ga. | 0.1065" | 1.27" | Round | 0.1065" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
35 ga. | 0.11" | 1.33" | Round | 0.11" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
34 ga. | 0.111" | 1.33" | Round | 0.111" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
33 ga. | 0.113" | 1.33" | Round | 0.113" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
32 ga. | 0.116" | 1.45" | Round | 0.116" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
31 ga. | 0.12" | 1.44" | Round | 0.12" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
30 ga. | 0.1285" | 1.43" | Round | 0.1285" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
29 ga. | 0.136" | 1.54" | Round | 0.136" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
28 ga. | 0.1405" | 1.53" | Round | 0.1405" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
27 ga. | 0.144" | 1.65" | Round | 0.144" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
26 ga. | 0.147" | 1.65" | Round | 0.147" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
25 ga. | 0.1495" | 1.65" | Round | 0.1495" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
24 ga. | 0.152" | 1.77" | Round | 0.152" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
23 ga. | 0.154" | 1.76" | Round | 0.154" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
22 ga. | 0.157" | 1.76" | Round | 0.157" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
21 ga. | 0.159" | 1.88" | Round | 0.159" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
20 ga. | 0.161" | 1.88" | Round | 0.161" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
19 ga. | 0.166" | 1.87" | Round | 0.166" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
18 ga. | 0.1695" | 1.87" | Round | 0.1695" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
17 ga. | 0.173" | 1.92" | Round | 0.173" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
16 ga. | 0.177" | 1.92" | Round | 0.177" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
15 ga. | 0.18" | 1.91" | Round | 0.18" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
14 ga. | 0.182" | 1.91" | Round | 0.182" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
13 ga. | 0.185" | 2.03" | Round | 0.185" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
12 ga. | 0.189" | 2.02" | Round | 0.189" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
11 ga. | 0.191" | 2.02" | Round | 0.191" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
10 ga. | 0.1935" | 2.14" | Round | 0.1935" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
9 ga. | 0.196" | 2.14" | Round | 0.196" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |
8 ga. | 0.199" | 2.13" | Round | 0.199" | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 0000000 | 0000 |