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Drill Size Conversion Table

This table is the chart for converting and identifying various drill bit sizes. Fract. (in) Decimal Wire No. /Letter Metric (mm) Fract. (in) Decimal Wire No. /Letter Metric (mm) Fract. (in) Decimal Wire No. /Letter Metric (mm)   0.0098   0.25   0.1065 36     0.3480 S     0.0118   0.30 7/64 0.1094       0.3543   9.00   0.0135 80     0.1100 35     0.3580 T     0.0138   0.35   0.1102   2.80 23/64 0.3594       0.0145 79     0.1110 34     0.3680 U   1/64 0.0156       0.1130 33     0.3740   9.50   0.0157   0.40   0.1142   2.90 3/8 0.3750       0.0160 78     0.1160 32     0.3770 V     0.0177   0.45   0.1181   3.00   0.3860 W     0.0180 77     0.1200 31   25/64 0.3906       0.0197   0.50 1/8 0.1250       0.3937   10.00   0.0200 76     0.1285 30     0.3970 X     0.0210 75     0.1360 29     0.4040 Y     0.0217   0.55   0.1378   3.50 13/32 0.4063       0.0225 74     0.1405 28     0.4130 Z     0.0236   0.60 9/64 0.1406       0.4134   10.50   0.0240 73     0.1440 27   27/64 0.4219       0.0250 72     0.1470 26     0.4331   11.00   0.0256   0.65   0.1495 25   7/16 0.4375       0.0260 71     0.1520 24     0.4528   11.50   0.0276   0.70   0.1540 23   29/64 0.4531       0.0280 70   5/32 0.1563     15/32 0.4688       0.0292 69     0.1570 22     0.4724   12.00   0.0295   0.75   0.1575   4.00 31/64 0.4844       0.0310 68     0.1590 21     0.4921   12.50 1/32 0.0313       0.1610 20   1/2 0.5000       0.0315   0.80   0.1660 19     0.5118   13.00   0.0320 67     0.1695 18   33/64 0.5156       0.0330 66   11/64 0.1719     17/32 0.5313       0.0335   0.85   0.1730 17     0.5315   13.50   0.0350 65     0.1770 16   35/64 0.5469       0.0354   0.90   0.1772   4.50   0.5512   14.00   0.0360 64     0.1800 15   9/16 0.5625       0.0370 63     0.1820 14     0.5709   14.50   0.0374   0.95   0.1850 13   37/64 0.5781       0.0380 62   3/16 0.1875       0.5905   15.00   0.0390 61     0.1890 12   19/32 0.5938       0.0394   1.00   0.1910 11   39/64 0.6094       0.0400 60     0.1935 10     0.6102   15.50   0.0410 59     0.1960 9   5/8 0.6250       0.0420 58     0.1968   5.00   0.6299   16.00   0.0430 57     0.1990 8   41/64 0.6406       0.0433   1.10   0.2010 7     0.6496   16.50   0.0465 56   13/64 0.2031     21/32 0.6563     3/64 0.0469       0.2040 6     0.6693   17.00   0.0472   1.20   0.2055 5   43/64 0.6719       0.0512   1.30   0.2090 4   11/16 0.6875       0.0520 55     0.2130 3     0.6890   17.50   0.0550 54     0.2165   5.50 45/64 0.7031       0.0551   1.40 7/32 0.2188       0.7087   18.00   0.0591   1.50   0.2210 2   23/32 0.7188       0.0595 53     0.2280 1     0.7283   18.50 1/16 0.0625       0.2340 A   47/64 0.7344       0.0630   1.60 15/64 0.2344       0.7480   19.00   0.0635 52     0.2362   6.00 3/4 0.7500       0.0669   1.70   0.2380 B   49/64 0.7656       0.0670 51     0.2420 C     0.7677   19.50   0.0700 50     0.2460 D   25/32 0.7813       0.0709   1.80 1/4 0.2500 E     0.7874   20.00   0.0730 49     0.2559   6.50 51/64 0.7969       0.0748   1.90   0.2570 F     0.8071   20.50   0.0760 48     0.2610 G   13/16 0.8125     5/64 0.0781     17/64 0.2656       0.8268   21.00   0.0785 47     0.2660 H   53/64 0.8281       0.0787   2.00   0.2720 I   27/32 0.8438       0.0810 46     0.2756   7.00   0.8465   21.50   0.0820 45     0.2770 J   55/64 0.8594       0.0827   2.10   0.2810 K     0.8661   22.00   0.0860 44   9/32 0.2813     7/8 0.8750       0.0866   2.20   0.2900 L     0.8858   22.50   0.0890 43     0.2950 M   57/64 0.8906       0.0906   2.30   0.2953   7.50   0.9055   23.00   0.0935 42   19/64 0.2969     29/32 0.9063     3/32 0.0938       0.3020 N   59/64 0.9219       0.0945   2.40 5/16 0.3125       0.9252   23.50   0.0960 41     0.3150   8.00 15/16 0.9375       0.0980 40     0.3160 O     0.9449   24.00   0.0984   2.50   0.3230 P   61/64 0.9531       0.0995 39   21/64 0.3281       0.9646   24.50   0.1015 38     0.3320 Q   31/32 0.9688       0.1024   2.60   0.3346   8.50   0.9842   25.00   0.1040 37     0.3390 R   63/64 0.9844       0.1063   2.70 11/32 0.3438     1 1.0000     Fract. (in) Decimal Wire No. /Letter Metric (mm) Fract. (in) Decimal Wire No. /Letter Metric (mm) Fract. (in) Decimal Wire No. /Letter Metric (mm)

THREAD/SCREW - Drill & Tap Chart

Machine Screw Size Threads Per Inch Minor Dia Tap Drills Clearance Hole Drills Alum, Brass, & Plasitcs 75% Thread Stainless Steel, Steels & Iron 50% Thread All Materials Close Fit Free Fit # or Dia Major Dia Drill Size Decimal Equiv. Drill Size Decimal Equiv. Drill Size Decimal Equiv. Drill Size Decimal Equiv. 0 .0600 80 .0447 3/64 .0469 55 .0520 52 .0635 50 .0700 1 .0730 64 .0538 53 .0595 1/16 .0625 48 .0760 46 .0810 72 .0560 53 .0595 52 .0635 2 .0860 56 .0641 50 .0700 49 .0730 43 .0890 41 .0960 64 .0668 50 .0700 48 .0760 3 .0990 48 .0734 47 .0785 44 .0860 37 .1040 35 .1100 56 .0771 45 .0820 43 .0890 4 .1120 40 .0813 43 .0890 41 .0960 32 .1160 30 .1285 48 .0864 42 .0935 40 .0980 5 .125 40 .0943 38 .1015 7/64 .1094 30 .1285 29 .1360 44 .0971 37 .1040 35 .1100 6 .138 32 .0997 36 .1065 32 .1160 27 .1440 25 .1495 40 .1073 33 .1130 31 .1200 8 .1640 32 .1257 29 .1360 27 .1440 18 .1695 16 .1770 36 .1299 29 .1360 26 .1470 10 .1900 24 .1389 25 .1495 20 .1610 9 .1960 7 .2010 32 .1517 21 .1590 18 .1695 12 .2160 24 .1649 16 .1770 12 .1890 2 .2210 1 .2280 28 .1722 14 .1820 10 .1935 32 .1777 13 .1850 9 .1960 1/4 .2500 20 .1887 7 .2010 7/32 .2188 F .2570 H .2660 28 .2062 3 .2130 1 .2280 32 .2117 7/32 .2188 1 .2280 5/16 .3125 18 .2443 F .2570 J .2770 P .3230 Q .3320 24 .2614 I .2720 9/32 .2812 32 .2742 9/32 .2812 L .2900 3/8 .3750 16 .2983 5/16 .3125 Q .3320 W .3860 X .3970 24 .3239 Q .3320 S .3480 32 .3367 11/32 .3438 T .3580 7/16 .4375 14 .3499 U .3680 25/64 .3906 29/64 .4531 15/32 .4687 20 .3762 25/64 .3906 13/32 .4062 28 .3937 Y .4040 Z .4130 1/2 .5000 13 .4056 27/64 .4219 29/64 .4531 33/64 .5156 17/32 .5312 20 .4387 29/64 .4531 15/32 .4688 28 .4562 15/32 .4688 15/32 .4688 9/16 .5625 12 .4603 31/64 .4844 33/64 .5156 37/64 .5781 19/32 .5938 18 .4943 33/64 .5156 17/32 .5312 24 .5114 33/64 .5156 17/32 .5312 5/8 .6250 11 .5135 17/32 .5312 9/16 .5625 41/64 .6406 21/32 .6562 18 .5568 37/64 .5781 19/32 .5938 24 .5739 37/64 .5781 19/32 .5938 11/16 .6875 24 .6364 41/64 .6406 21/32 .6562 45/64 .7031 23/32 .6562 3/4 .7500 10 .6273 21/32 .6562 11/16 .6875 49/64 .7656 25/32 .7812 16 .6733 11/16 .6875 45/64 .7031 20 .6887 45/64 .7031 23/32 .7188 13/16 .8125 20 .7512 49/64 .7656 25/32 .7812 53/64 .8281 27/32 .8438 7/8 .8750 9 .7387 49/64 .7656 51/64 .7969 57/64 .8906 29/32 .9062 14 .7874 13/16 .8125 53/64 .8281 20 .8137 53/64 .8281 27/32 .8438 15/16 .9375 20 .8762 57/64 .8906 29/32 .9062 61/64 .9531 31/32 .9688 1 1.000 8 .8466 7/8 .8750 59/64 .9219 1-1/64 1.0156 1-1/32 1.0313 12 .8978 15/16 .9375 61/64 .9531 20 .9387 61/64 .9531 31/32 .9688

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