TM 9-254 4-26.  Standard Drill Sizes to Decimal Equivalents Table 4-9.  Standard Drill Sizes Drill Dec Drill Dec Drill Dec Drill Dec Size Equiv Size Equiv Size Equiv Size Equiv 80 .0135 43 .089 8 .199 25/64 .3906 79 .0145 42 .0935 7 .201 X .397 1/64 .0156 3/32 .0938 13/64 .2031 Y .404 78 .016 41 .096 6 .204 13/32 .4062 77 .018 40 .098 5 .2055 Z .413 76 .020 39 .0995 4 .209 27/64 .4219 75 .021 38 .1015 3 .213 7/16 .4375 74 .0225 37 .104 7/32 .2188 29/64 .4531 73 .024 36 .1065 2 .221 15/32 .4688 72 .025 7/64 .1094 1 .228 31/64 .4844 71 .026 35 .110 A .234 1/2 .500 70 .028 34 .111 15/64 .2344 33/64 .5156 69 .0292 33 .113 B .238 17/32 .5312 68 .031 32 .116 C .242 35/64 .5469 1/32 .0312 31 .120 D .246 9/16 .5625 67 .032 1/8 .125 1/4 (E) .250 37/64 .5781 66 .033 30 .1285 F .257 19/32 .5938 65 .035 29 .136 G .261 39/64 .6094 64 .036 28 .1405 17/64 .2656 5/8 .625 63 .037 9/64 .1406 H .266 41/64 .6406 62 .038 27 .144 I .272 21/32 .6562 61 .039 26 .147 J .277 43/64 .6719 60 .040 25 .1495 K .281 11/16 .6875 59 .041 24 .152 9/32 .2812 45/64 .7031 58 .042 23 .154 L .290 23/32 .7188 57 .043 5/32 .1562 M .295 47/64 .7344 56 .0465 22 .157 19/64 .2969 3/4 .750 3/64 .0469 21 .159 N .302 49/64 .7656 55 .052 20 .161 5/16 .3125 25/32 .7812 54 .055 19 .166 O .316 51/64 .7969 53 .0595 18 .1695 P .323 13/16 .8125 1/16 .0625 11/64 .1719 21/64 .3281 53/64 .8281 52 .0635 17 .173 Q .332 27/32 .8438 51 .067 16 .177 R .339 55/64 .8594 50 .070 15 .180 11/32 .3438 7/8 .875 49 .073 14 .182 S .348 57/64 .8906 48 .076 13 .185 T .358 29/32 .9062 5/64 .0731 3/16 .1875 23/64 .3594 59/64 .9219 47 .0785 12 .189 U .368 15/16 .9375 46 .081 11 .191 3/8 .375 61/64 .9531 45 .082 10 .1935 V .377 31/32 .9688 44 .086 9 .196 W .386 63/64 .9844 Change 6  4-59