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Screw Size and Conversion Tables

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Screw Size
Size Number 000 00 0 1 2 3 4 5 6 8 10 12
Diameter .034 .047 .060 .073 .086 .099 .112 .125 .138 .164 .190 .216
Hole Diameter .040 .053 .066 .080 .094 .107 .120 .133 .146 .173 .198 .224

Decimal and Millimeter Equivalents of Fractional Parts of an Inch
Fraction Decimal Millimeter   Fraction Decimal Millimeter   Fraction Decimal Millimeter
1 1.0000 25.4000   21/32 0.6562 16.6687   5/16 0.3125 7.9375
63/64 0.984 25.0031   41/64 0.6406 16.2719   19/64 0.2969 7.5406
31/32 0.9688 24.6062   5/8 0.6250 15.8750   9/32 0.2812 7.1437
61/64 0.9531 24.2094   39/64 0.6094 15.4781   17/64 0.2656 6.7469
15/16 0.9375 23.8125   19/32 0.5938 15.0813   1/4 0.2500 6.3500
59/64 0.9219 23.4156   37/64 0.5781 14.6844   15/64 0.2344 5.9531
29/32 0.9062 23.0187   9/16 0.5625 14.2875   7/32 0.2188 5.5563
57/64 0.8906 22.6219   35/64 0.5469 13.8906   13/64 0.2031 5.1594
7/8 0.8750 22.2250   17/32 0.5312 13.4937   3/16 0.1875 4.7625
55/64 0.8594 21.8281   33/64 0.5156 13.0969   11/64 0.1719 4.3656
27/32 0.8438 21.4312   1/2 0.5000 12.7000   5/32 0.1562 3.9688
53/64 0.8281 21.0344   31/64 0.4844 12.3031   9/64 0.1406 3.5719
13/16 0.8125 20.6375   15/32 0.4688 11.9062   1/8 0.1250 3.1750
51/64 0.7969 20.2406   29/64 0.4531 11.5094   7/64 0.1094 2.7781
25/32 0.7812 19.8438   7/16 0.4375 11.1125   3/32 0.0938 2.3812
49/64 0.7656 19.4469   27/64 0.4220 10.7188   5/64 0.0781 1.9844
3/4 0.7500 19.0500   13/32 0.4062 10.3187   1/16 0.0625 1.5875
47/64 0.7344 18.6531   25/64 0.3906 9.9219   3/64 0.0469 1.1906
23/32 0.7188 18.2563   3/8 0.3750 9.5250   1/32 0.0312 0.7937
45/64 0.7031 17.8594   23/64 0.3594 9.1281   1/64 0.0156 0.3969
11/16 0.6875 17.4625   11/32 0.3438 8.7312   -- -- --
43/64 0.6719 17.0656   21/64 0.3281 8.3344   -- -- --

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