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US Drill Sizes Chart (Decimal and Metric)

USADrillSizesChart.pdf

Drill Decimal Metric Drill Decimal Metric Drill Decimal Metric Drill Decimal Metric
80 0.0135 0.34 40 0.098 2.49 2 0.221 5.61 3/8 0.375 9.53
79 0.0145 0.37 39 0.0995 2.53 1 0.228 5.79 V 0.377 9.58
1/64 0.0156 0.40 38 0.1015 2.58 A 0.234 5.94 W 0.386 9.80
78 0.016 0.41 37 0.104 2.64 15/64 0.2344 5.95 25/64 0.3906 9.92
77 0.018 0.46 36 0.1065 2.71 B 0.238 6.05 X 0.397 10.08
76 0.02 0.51 7/64 0.1094 2.78 C 0.242 6.15 Y 0.404 10.26
75 0.021 0.53 35 0.11 2.79 D 0.246 6.25 13/32 0.4062 10.32
74 0.0225 0.57 34 0.111 2.82 E 0.25 6.35 Z 0.413 10.49
73 0.024 0.61 33 0.113 2.87 1/4 0.25 6.35 27/64 0.4219 10.72
72 0.025 0.64 32 0.116 2.95 F 0.257 6.53 7/16 0.4375 11.11
71 0.026 0.66 31 0.12 3.05 G 0.261 6.63 29/64 0.4531 11.51
70 0.028 0.71 1/8 0.125 3.18 17/64 0.2656 6.75 15/32 0.4688 11.91
69 0.0292 0.74 30 0.1285 3.26 H 0.266 6.76 31/64 0.4844 12.30
68 0.031 0.79 29 0.136 3.45 I 0.272 6.91 1/2 0.5 12.70
1/32 0.0312 0.79 28 0.1405 3.57 J 0.277 7.04 33/64 0.5156 13.10
67 0.032 0.81 9/64 0.1406 3.57 K 0.281 7.14 17/32 0.5312 13.49
66 0.033 0.84 27 0.144 3.66 9/32 0.2812 7.14 35/64 0.5469 13.89
65 0.035 0.89 26 0.147 3.73 L 0.29 7.37 9/16 0.5625 14.29
64 0.036 0.91 25 0.1495 3.80 M 0.295 7.49 37/64 0.5781 14.68
63 0.037 0.94 24 0.152 3.86 19/64 0.2969 7.54 19/32 0.5938 15.08
62 0.038 0.97 23 0.154 3.91 N 0.302 7.67 39/64 0.6094 15.48
61 0.039 0.99 5/32 0.1562 3.97 5/16 0.3125 7.94 5/8 0.625 15.88
60 0.04 1.02 22 0.157 3.99 O 0.316 8.03 41/64 0.6406 16.27
59 0.041 1.04 21 0.159 4.04 P 0.323 8.20 21/32 0.6562 16.67
58 0.042 1.07 20 0.161 4.09 21/64 0.3281 8.33 43/64 0.6719 17.07
57 0.043 1.09 19 0.166 4.22 Q 0.332 8.43 11/16 0.6875 17.46
56 0.0465 1.18 18 0.1695 4.31 R 0.339 8.61 45/64 0.7031 17.86
3/64 0.0469 1.19 11/64 0.1719 4.37 11/32 0.3438 8.73 23/32 0.7188 18.26
55 0.052 1.32 17 0.173 4.39 S 0.348 8.84 47/64 0.7344 18.65
54 0.055 1.40 16 0.177 4.50 T 0.358 9.09 3/4 0.75 19.05
53 0.0595 1.51 15 0.18 4.57 23/64 0.3594 9.13 49/64 0.7656 19.45
1/16 0.0625 1.59 14 0.182 4.62 U 0.368 9.35 25/32 0.7812 19.84
Drill Decimal Metric Drill Decimal Metric Drill Decimal Metric
52 0.0635 1.61 13 0.185 4.70 51/64 0.7969 20.24
51 0.067 1.70 3/16 0.1875 4.76 13/16 0.8125 20.64
50 0.07 1.78 12 0.189 4.80 53/64 0.8281 21.03
49 0.073 1.85 11 0.191 4.85 27/32 0.8438 21.43
48 0.076 1.93 10 0.1935 4.91 55/64 0.8594 21.83
5/64 0.0781 1.98 9 0.196 4.98 7/8 0.875 22.23
47 0.0785 1.99 8 0.199 5.05 57/64 0.8906 22.62
46 0.081 2.06 7 0.201 5.11 29/32 0.9062 23.02
45 0.082 2.08 13/64 0.2031 5.16 59/64 0.9219 23.42
44 0.086 2.18 6 0.204 5.18 15/16 0.9375 23.81
43 0.089 2.26 5 0.2055 5.22 61/64 0.9531 24.21
42 0.0935 2.37 4 0.209 5.31 31/32 0.9688 24.61
3/32 0.0938 2.38 3 0.213 5.41 63/64 0.9844 25.00
41 0.096 2.44 7/32 0.2188 5.56 1 1 25.40

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