US number drill gauge
# | inch | mm | | # | inch | mm | | # | inch | mm | | # | inch | mm | | # | inch | mm | |
1 | 0.228 | 5.79 | | 17 | 0.173 | 4.39 | | 33 | 0.113 | 2.87 | | 49 | 0.073 | 1.85 | | 65 | 0.035 | 0.89 | |
2 | 0.221 | 5.61 | | 18 | 0.170 | 4.32 | | 34 | 0.111 | 2.82 | | 50 | 0.070 | 1.78 | | 66 | 0.033 | 0.84 | |
3 | 0.213 | 5.41 | | 19 | 0.166 | 4.22 | | 35 | 0.110 | 2.79 | | 51 | 0.067 | 1.70 | | 67 | 0.032 | 0.81 | |
4 | 0.209 | 5.31 | | 20 | 0.161 | 4.09 | | 36 | 0.106 | 2.69 | | 52 | 0.064 | 1.63 | | 68 | 0.031 | 0.79 | |
5 | 0.205 | 5.21 | | 21 | 0.159 | 4.04 | | 37 | 0.104 | 2.64 | | 53 | 0.059 | 1.50 | | 69 | 0.029 | 0.74 | |
6 | 0.204 | 5.18 | | 22 | 0.157 | 3.99 | | 38 | 0.102 | 2.59 | | 54 | 0.055 | 1.40 | | 70 | 0.028 | 0.71 | |
7 | 0.201 | 5.11 | | 23 | 0.154 | 3.91 | | 39 | 0.100 | 2.54 | | 55 | 0.052 | 1.32 | | 71 | 0.026 | 0.66 | |
8 | 0.199 | 5.05 | | 24 | 0.152 | 3.86 | | 40 | 0.098 | 2.49 | | 56 | 0.046 | 1.17 | | 72 | 0.025 | 0.64 | |
9 | 0.196 | 4.98 | | 25 | 0.149 | 3.78 | | 41 | 0.096 | 2.44 | | 57 | 0.043 | 1.09 | | 73 | 0.024 | 0.61 | |
10 | 0.194 | 4.93 | | 26 | 0.147 | 3.73 | | 42 | 0.093 | 2.36 | | 58 | 0.042 | 1.07 | | 74 | 0.022 | 0.56 | |
11 | 0.191 | 4.85 | | 27 | 0.144 | 3.66 | | 43 | 0.089 | 2.26 | | 59 | 0.041 | 1.04 | | 75 | 0.021 | 0.53 | |
12 | 0.189 | 4.80 | | 28 | 0.141 | 3.58 | | 44 | 0.086 | 2.18 | | 60 | 0.040 | 1.02 | | 76 | 0.020 | 0.51 | |
13 | 0.185 | 4.70 | | 29 | 0.136 | 3.45 | | 45 | 0.082 | 2.08 | | 61 | 0.039 | 0.99 | | 77 | 0.018 | 0.46 | |
14 | 0.182 | 4.62 | | 30 | 0.129 | 3.28 | | 46 | 0.081 | 2.06 | | 62 | 0.038 | 0.97 | | 78 | 0.016 | 0.41 | |
15 | 0.180 | 4.57 | | 31 | 0.120 | 3.05 | | 47 | 0.079 | 2.01 | | 63 | 0.037 | 0.94 | | 79 | 0.015 | 0.38 | |
16 | 0.177 | 4.50 | | 32 | 0.116 | 2.95 | | 48 | 0.076 | 1.93 | | 64 | 0.036 | 0.91 | | 80 | 0.013 | 0.33 | |