Decimal Equivalents
Fractional * Metric * Wire Size Drills * Letter Size Drill

MM Tap English Decimal MM Tap English Decimal MM Tap English Decimal MM Tap English Decimal
                               
.1     .0039   3x56 45 .0820     5 .2055     7/16 .4375
.2     .0079     44 .0860     4 .2090   1/2x20 29/64 .4531
.3     .0118   4x40 43 .0890   1/4x28 3 .2130     15/32 .4687
    80 .0135   4x48 42 .0935     7/32 .2187 12.     .4724
  0x80 79 .0145     3/32 .0937     2 .2210   9/16x12 31/64 .4844
    1/64 .0156     41 .0960     1 .2280     1/2 .5000
.4     .0157     40 .0980     A .2340 13.     .5118
    78 .0160     39 .0995     15/64 .2344   9/16x18 33/64 .5156
    77 .0180   5x40 38 .1015 6.     .2362     17/32 .5312
.5     .0197   5x44 37 .1040     B .2380   5/8x11 35/64 .5469
    76 .0200   6x32 36 .1065     C .2420 14.     .5512
    75 .0210     7/64 .1094     D .2460     9/16 .5625
    74 .0225     35 .1100     1/4 .2500   5/818 37/64 .5781
.6     .0236     34 .1110   5/16x18 F .2570 15.     .5906
    73 .0240   6x40 33 .1130     G .2610     19/32 .5937
    72 .0250     32 .1160     17/64 .2656     39/64 .6094
    71 .0260 3.   .. .1181     H .2660     5/8 .6250
.7     .0276     31 .1200   5/16x24 I .2720 16.     .6299
    70 .0280     1/8 .1250 7.     .2756   3/4x10 41/64 .6406
    69 .0292     30 .1285     J .2770     21/32 .6562
    68 .0310   8x32-36 29 .1360     K .2810 17.     .6693
    1/32 .0312     28 .1405     9/32 .2812     43/64 .6719
.8     .0315     9/64 .1406     L .2900     11/16 .6875
    67 .0320     27 .1440     M .2950   3/4x16 45/64 .7031
    66 .0330     26 .1470     19/64 .2969 18.     .7087
    65 .0350   10x24 25 .1495     N .3020     23/32 .7187
.9     .0354     24 .1520   3/8x16 5/16 .3125     47/64 .7344
    64 .0360     23 .1540 8.     .3150 19.     .7480
    63 .0370     5/32 .1562     O .3160     3/4 .7500
    62 .0380     22 .1570     P .3230   7/8x9 49/64 .7656
    61 .0390 4.     .1575     21/64 .3281     25/32 .7812
1.     .0394   10x32 21 .1590   3/8x24 Q .3320 20.     .7874
    60 .0400     20 .1610     R .3390     51/64 .7969
    59 .0410     19 .1660     11/32 .3437     13/16 .8125
    58 .0420     18 .1695     S .3480 21.     .8268
    57 .0430     11/64 .1719 9.     .3543   7/8x14 53/64 .8281
    56 .0465     17 .1730     T .3580     27/32 .8437
    3/64 .0469   10x24 16 .1770     23/64 .3594     55/64 .8594
    55 .0520     15 .1800   7/16x14 U .3680 22.     .8661
    54 .0550   12x28 14 .1820     3/8 .3750     7/8 .8750
  1x64-72 53 .0595     13 .1850     V .3770   1x8 57/64 .8906
    1/16 .0625     3/16 .1875     W .3860 23.     .9055
  2x56-64 52 .0635     12 .1890   7/16x20 25/64 .3906     29/32 .9062
    51 .0670     11 .1910 10.     .3937     59/64 .9219
    50 .0700     10 .1935     X .3970     15/16 .9375
    49 .0730     9 .1960     Y .4040 24.     .9449
    48 .0760 5.     .1968     13/32 .4062   1x12 61/64 .9531
    5/64 .0781     8 .1990     Z .4130     31/32 .9687
  3x48 47 .0785   1/4x20 7 .2010   1/2x13 27/64 .4219 25.   .. .9842
2.     .0787     13/64 .2031 11.     .4331     63/64 .9844
    46 .0810     6 .2040         25.4   1 1.000

 

 

 

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