Number Machine Screws Tap Drills Table
This table is the chart for publication of information of number machine screws, along with tap and clearance drill information. If all else fails, you may want to use our Drill Size Conversion Table or our Tap Drill Size Calculator. The information available from our sources is usually sufficient for all computer related drill or screw requirements world wide.
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| Screw Size |
|
Tapping Drills |
|
Clearance Drills |
| Number | Threads
/Inch | Series | Nom. Dia. (in) |
Drill Size
(65-75% thread) | Equivalents |
Close Fit | Free Fit |
| (decimal) | (mm) |
Drill Size | Dec. Equiv. | Drill Size | Dec. Equiv. |
|
| 000 | 120 | | 0.0340 |
71 | 0.0260 | 0.6604 |
65 | 0.0350 | 62 | 0.0380 |
| 00 | 90 | | 0.0470 |
65 | 0.0350 | 0.8890 |
3/64" | 0.0469 | 55 | 0.0520 |
| 0 | 80 | NF | 0.0600 |
3/64" | 0.0469 | 1.1913 |
52 | 0.0635 | 50 | 0.0700 |
| 1 | 56 | NS | 0.0730 |
54 | 0.0550 | 1.3970 |
48 | 0.0760 | 46 | 0.0810 |
| 64 | NC |
53 | 0.0595 | 1.5113 |
| 72 | NF |
53 | 0.0595 | 1.5113 |
| 2 | 56 | NC | 0.0860 |
50 | 0.0700 | 1.7780 |
43 | 0.0890 | 41 | 0.0960 |
| 64 | NF |
50 | 0.0700 | 1.7780 |
| 3 | 48 | NC | 0.0990 |
47 | 0.0785 | 1.9939 |
37 | 0.1040 | 35 | 0.1100 |
| 56 | NF |
45 | 0.0820 | 2.0828 |
| 4 | 36 | NS | 0.1120 |
44 | 0.0860 | 2.1844 |
32 | 0.1160 | 30 | 0.1285 |
| 40 | NC |
43 | 0.0890 | 2.2606 |
| 48 | NF |
42 | 0.0935 | 2.3749 |
| 5 | 40 | NC | 0.1250 |
38 | 0.1015 | 2.5781 |
30 | 0.1285 | 29 | 0.1360 |
| 44 | NF |
37 | 0.1040 | 2.6416 |
| 6 | 32 | NC | 0.1380 |
36 | 0.1065 | 2.7051 |
27 | 0.1440 | 25 | 0.1495 |
| 36 | NS |
34 | 0.1110 | 2.8194 |
| 40 | NF |
33 | 0.1130 | 2.8702 |
| 8 | 32 | NC | 0.1640 |
29 | 0.1360 | 3.4544 |
18 | 0.1695 | 16 | 0.1770 |
| 36 | NF |
29 | 0.1360 | 3.4544 |
| 40 | NS |
28 | 0.1405 | 3.5687 |
| 10 | 24 | NC | 0.1900 |
25 | 0.1495 | 3.7973 |
9 | 0.1960 | 7 | 0.2010 |
| 30 | NS |
22 | 0.1570 | 3.9878 |
| 32 | NF |
21 | 0.1590 | 4.0386 |
| 12 | 24 | NC | 0.2160 |
16 | 0.1770 | 4.4958 |
2 | 0.2210 | 1 | 0.2280 |
| 28 | NF |
14 | 0.1820 | 4.6228 |
| 32 | NEF |
13 | 0.1850 | 4.6990 |
| 14 | 20 | NS | 0.2420 |
10 | 0.1935 | 4.9149 |
D | 0.2460 | F | 0.2570 |
| 24 | NS |
7 | 0.2010 | 5.1054 |
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| Number | Threads
/Inch | Series | Nom. Dia. (in) |
Drill Size
(65-75% thread) | (decimal) | (mm) |
Drill Size | Dec. Equiv. | Drill Size | Dec. Equiv. |
| Equivalents |
Close Fit | Free Fit |
| Screw Size |
Tapping Drills |
Clearance Drills |
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Version 1.0.1
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