Drill Number / Decimal Cross Referencedrill number | decimal (inch) | decimal (mm) |
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97 | .0059 | .150 | 96 | .0063 | .160 | 95 | .0067 | .170 | 94 | .0071 | .180 | 93 | .0075 | .190 | 92 | .0079 | .200 | 91 | .0083 | .211 | 90 | .0087 | .221 | 89 | .0091 | .231 | 88 | .0095 | .241 | 87 | .0100 | .254 | 86 | .0105 | .267 | 85 | .0110 | .280 | 84 | .0115 | .292 | 83 | .0120 | .305 | 82 | .0125 | .318 | 81 | .0130 | .330 | 80 | .0135 | .343 | 79 | .0145 | .368 | 78 | .0160 | .406 | 77 | .0180 | .457 | 76 | .0200 | .508 | 75 | .0210 | .533 | 74 | .0225 | .572 | 73 | .0240 | .610 | 72 | .0250 | .635 | 71 | .0260 | .660 | 70 | .0280 | .711 | 69 | .0292 | .742 | 68 | .0310 | .787 | 67 | .0320 | .813 | 66 | .0330 | .838 | 65 | .0350 | .889 | 64 | .0360 | .914 | 63 | .0370 | .940 | 62 | .0380 | .965 | 61 | .0390 | .991 | 60 | .0400 | 1.016 | 59 | .0410 | 1.041 | 58 | .0420 | 1.067 | 57 | .0430 | 1.092 | 56 | .0465 | 1.181 | 55 | .0520 | 1.321 | 54 | .0550 | 1.397 | 53 | .0595 | 1.511 | 52 | .0635 | 1.613 | 51 | .0670 | 1.702 | 50 | .0700 | 1.778 | 49 | .0730 | 1.854 | 48 | .0760 | 1.930 | 47 | .0785 | 1.994 | 46 | .0810 | 2.057 | 45 | .0820 | 2.083 | 44 | .0860 | 2.184 | 43 | .0890 | 2.261 | 42 | .0935 | 2.375 | 41 | .0960 | 2.438 | 40 | .0980 | 2.489 | 39 | .0995 | 2.527 | 38 | .1015 | 2.578 | 37 | .1040 | 2.642 | 36 | .1065 | 2.705 | 35 | .1100 | 2.794 | 34 | .1110 | 2.819 | 33 | .1130 | 2.870 | 32 | .1160 | 2.946 | 31 | .1200 | 3.048 | 30 | .1285 | 3.264 | 29 | .1360 | 3.454 | 28 | .1405 | 3.569 | 27 | .1440 | 3.658 | 26 | .1470 | 3.734 | 25 | .1495 | 3.797 | 24 | .1520 | 3.861 | 23 | .1540 | 3.912 | 22 | .1570 | 3.988 | 21 | .1590 | 4.039 | 20 | .1610 | 4.089 | 19 | .1660 | 4.216 | 18 | .1695 | 4.305 | 17 | .1730 | 4.394 | 16 | .1770 | 4.496 | 15 | .1800 | 4.572 | 14 | .1820 | 4.623 | 13 | .1850 | 4.700 | 12 | .1890 | 4.800 | 11 | .1910 | 4.851 | 10 | .1935 | 4.915 | 9 | .1960 | 4.978 | 8 | .1990 | 5.054 | 7 | .2010 | 5.105 | 6 | .2040 | 5.182 | 5 | .2055 | 5.220 | 4 | .2090 | 5.309 | 3 | .2130 | 5.410 | 2 | .2210 | 5.613 | 1 | .2280 | 5.791 |
| Drill Letter / Decimal Cross Referencedrill letter | decimal (inch) | decimal (mm) |
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A | .2340 | 5.944 | B | .2380 | 6.045 | C | .242 | 6.147 | D | .2460 | 6.248 | E | .2500 | 6.350 | F | .2570 | 6.528 | G | .2610 | 6.629 | H | .2660 | 6.756 | I | .2720 | 6.909 | J | .2770 | 7.036 | K | .2810 | 7.137 | L | .2900 | 7.366 | M | .2950 | 7.493 | N | .3020 | 7.671 | O | .3160 | 8.026 | P | .3230 | 8.204 | Q | .3320 | 8.433 | R | .3390 | 8.611 | S | .3480 | 8.839 | T | .3580 | 9.093 | U | .3680 | 9.347 | V | .3770 | 9.576 | W | .3860 | 9.804 | X | .3970 | 10.084 | Y | .4040 | 10.262 | Z | .4130 | 10.490 |
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