Comparison of 
Decimal Equivalents

 

METRIC NUMBER DRILL GALVANIZED SHEET METAL FRACTION
OD* SCREW SIZE LETTER DRILL NOMINAL OD*  PIPE SIZE
0.10 .0039   0.85 .0350   45 .0820   03.90 .1535   A .2340   08.70 .3425   14.50 .5709
97 .0059   65 .0350   02.10 .0827   23 .1540    15/64 .2344    11/32 .3438   37/64 .5781
96 .0063   0.90 .0354   02.15 .0846     5/32 .1562   06.00 .2362   08.80 .3465   15.00 .5906
95 .0067   64 .0360   44 .0860   22 .1570   B .2380   S .3480   19/32 .5938
94 .0071   63 .0370   #2 .0860   04.00 .1575   06.10 .2402   08.90 .3504   39/64 .6094
93 .0075   0.95 .0374   02.20 .0866   21 .1590   C .2420   09.00 .3543   15.50 .6102
92 .0079   62 .0380   02.25 .0886   20 .1610   #14 .2420   T .3580     5/8 .6250
0.20 .0079   61 .0390   43 .0890   04.10 .1614   06.20 .2441   09.10 .3583   16.00 .6299
91 .0083   01.00 .0394   02.30 .0906   #8 .1640   D .2460    23/64 .3594   41/64 .6406
90 .0087   20ga .0396   02.35 .0925   04.20 .1654   06.30 .2480   09.20 .3622   16.50 .6496
89 .0091   60 .0400   42 .0935   19 .1660     1/4 .2500   09.30 .3661   21/32 .6562
88 .0095   59 .0410   3/32 .0938   04.30 .1693   E .2500   U .3680   17.00 .6693
87 .0100   01.05 .0413   02.40 .0945   18 .1695   06.40 .2520   09.40 .3701   43/64 .6719
86 .0105   58 .0420   41 .0960    11/64 .1719   06.50 .2559   09.50 .3740   3/8nps .6750
85 .0110   57 .0430   02.45 .0965   17 .1730   F .2570     3/8 .3750    11/16 .6875
84 .0115   01.10 .0433   40 .0980   04.40 .1732   06.60 .2598   V .3770   17.50 .6890
0.30 .0118   01.15 .0453   02.50 .0984   16 .1770   G .2610   09.60 .3780   45/64 .7031
83 .0120   56 .0465   39 .0995   #9 .1770   06.70 .2638   09.70 .3819   18.00 .7087
82 .0125   3/64 .0469   38 .1015   04.50 .1772    17/64 .2656   09.80 .3858   23/32 .7188
81 .0130   01.20 .0472   02.60 .1024   15 .1800   H .2660   W .3860   18.50 .7283
32ga .0134   01.25 .0492   37 .1040   04.60 .1811   06.80 .2677   09.90 .3898   47/64 .7344
80 .0135   01.30 .0512   02.70 .1063   14 .1820   06.90 .2717    25/64 .3906   19.00 .7480
0.35 .0138   18ga .0516   36 .1065   13 .1850   I .2720   10.00 .3937     3/4 .7500
79 .0145   55 .0520   7/64 .1094   04.70 .1850   07.00 .2756   X .3970   49/64 .7656
1/64 .0156   01.35 .0531   35 .1100     3/16 .1875   J .2770   10.20 .4016   19.50 .7677
0.40 .0157   54 .0550   02.80 .1102   12 .1890   07.10 .2795   Y .4040   25/32 .7812
30ga .0157   01.40 .0551   34 .1110   04.80 .1890   K .2810   1/8nps .4050   20.00 .7874
78 .0160   01.45 .0571   #4 .1120   #10 .1900     9/32 .2812   10.30 .4058   51/64 .7969
0.45 .0177   01.50 .0591   33 .1130   11 .1910   07.20 .2835    13/32 .4062   20.50 .8071
77 .0180   53 .0595   02.90 .1142   04.90 .1929   07.30 .2874   Z .4130   13/16 .8125
28ga .0187   #0 .0600   32 .1160   10 .1935   L .2900   10.50 .4134   21.00 .8268
0.50 .0197   01.55 .0610   03.00 .1181   9 .1960   07.40 .2913    27/64 .4219   53/64 .8281
76 .0200   1/16 .0625   31 .1200   05.00 .1969   M .2950   10.80 .4252   1/2nps .8400
75 .0210   01.60 .0630   03.10 .1220   8 .1990   07.50 .2953   11.00 .4331   27/32 .8438
0.55 .0217   16ga .0635   1/8 .1250   05.10 .2008    19/64 .2969     7/16 .4375   21.50 .8465
26ga .0217   52 .0650   #5 .1250   7 .2010   07.60 .2992   11.20 .4409   55/64 .8594
74 .0225   01.65 .0650   03.20 .1260    13/64 .2031   N .3020   11.50 .4528   22.00 .8661
0.60 .0236   01.70 .0669   30 .1285   6 .2040   07.70 .3031    29/64 .4531     7/8 .8750
73 .0240   51 .0670   03.30 .1299   05.20 .2047   07.80 .3071   11.80 .4646   22.50 .8858
72 .0250   01.75 .0689   03.40 .1339   5 .2055   07.90 .3110    15/32 .4688   57/64 .8906
0.65 .0256   50 .0700   29 .1360   05.30 .2087     5/16 .3125   12.00 .4724   23.00 .9055
71 .0260   01.80 .0709   03.50 .1378   4 .2090   08.00 .3150   12.20 .4803   29/32 .9062
0.70 .0276   49 .0730   #6 .1380   05.40 .2126   O .3160    31/64 .4844   59/64 .9219
24ga .0276   #1 .0730   28 .1405   3 .2130   08.10 .3189   12.50 .4921   23.50 .9252
70 .0280   01.90 .0748   9/64 .1406   #12 .2160   08.20 .3228     1/2 .5000   15/16 .9357
69 .0292   48 .0760   03.60 .1417   05.50 .2165   P .3230   13.00 .5118   24.00 .9449
0.75 .0295   01.95 .0768   27 .1440     7/32 .2188   08.30 .3268    33/64 .5156   61/64 .9531
68 .0310   5/64 .0781   03.70 .1457   05.60 .2205    21/64 .3281   17/32 .5312   24.50 .9646
1/32 .0312   47 .0785   26 .1470   2 .2210   08.40 .3307   13.50 .5315   31/32 .9688
0.80 .0315   #14ga .0785   25 .1495   05.70 .2244   Q .3320   1/4nps .5400   25.00 .9843
67 .0320   02.00 .0787   03.80 .1496   1 .2280   08.50 .3346   35/64 .5469   63/64 .9844
66 .0330   02.05 .0807   #7 .1510   05.80 .2283   08.60 .3386   14.00 .5512   1 1.0000
22ga .0336   46 .0810   24 .1520   05.90 .2323   R .3390     9/16 .5625   3/4nps 1.0500

* Outside Diameter

 

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