Machinery's Handbook, 31st Edition
Box Wrench Clearances 1693 Table 4. Clearances for Box Wrenches - 12 Point Inch and Metric Series D A B
A
C
Nominal Wrench Openin g
US Customary (inch)
Metric (mm)
1 ∕ 8 (0.125) 0.179 0.219 0.030 0.172 5 ∕ 32 (0.156) 0.187 0.244 0.030 0.172 3 ∕ 16 (0.188) 0.218 0.301 0.030 0.203 7 ∕ 32 (0.219) 0.233 0.325 0.030 0.234 (0.250) 0.269 0.378 0.030 0.295 9 ∕ 32 (0.281) 0.280 0.407 0.030 0.280 1 ∕ 4 5 ∕ 16 (0.313) 0.316 0.461 0.030 0.330 11 ∕ 32 (0.344) 0.336 0.499 0.030 0.335 (0.375) 0.362 0.543 0.030 0.344 7 ∕ 16 (0.438) 0.395 0.612 0.030 0.391 3 ∕ 8
60 90
4 5 6 7 8 9
4.56 6.03 0.762 5.26 7.29 0.762 7.11 9.69 0.762 7.91 11.05 0.762 8.26 11.98 0.762 9.46 13.76 0.762
4.0 4.6 6.0 7.4 7.7 8.2 9.0 9.0
12 17 18 20 27 30 40 71 80 91
150 165 220 248 275
5.5 6.66 8.97 0.762
275 10 10.16 15.04 0.762
605 11 10.71 16.15 0.762 10.0
715 12
11.46 17.47 0.762 10.0
1 ∕ 2 (0.500) 0.442 0.694 0.030 0.394 1020 13 12.31 18.89 0.762 10.5 115 9 ∕ 16 (0.563) 0.492 0.779 0.030 0.425 1500 14 12.96 20.10 0.762 11.5 158 5 ∕ 8 (0.625) 0.530 0.853 0.030 0.500 2200 15 13.76 21.46 0.762 11.5 200 11 ∕ 16 (0.688) 0.577 0.935 0.030 0.535 2640 16 14.26 22.53 0.762 12.1 248 3 ∕ 4 (0.750) 0.618 1.012 0.030 0.594 2860 17 15.41 24.25 0.762 12.7 267 13 ∕ 16 (0.813) 0.702 1.132 0.030 0.609 3300 18 15.41 24.83 0.762 12.7 304 7 ∕ 8 (0.875) 0.718 1.183 0.030 0.688 3630 19 16.36 26.35 0.762 14.8 323 15 ∕ 16 (0.938) 0.765 1.266 0.030 0.701 4510 20 17.21 27.77 0.762 14.8 347 1 (1.000) 0.796 1.330 0.030 0.719 5390 21 17.66 28.79 0.762 16.3 372 1 1 ∕ 16 (1.063) 0.874 1.445 0.030 0.790 5940 22 18.56 30.27 0.762 16.3 408 1 1 ∕ 8 (1.125) 0.892 1.498 0.030 0.860 6430 23 19.41 31.69 0.762 16.5 455 1 3 ∕ 16 (1.188) 0.937 1.579 0.030 0.890 7200 24 19.81 32.65 0.762 17.8 509 1 1 ∕ 4 (1.250) 0.983 1.661 0.030 0.940 7920 25 20.86 34.24 0.762 17.9 559 1 5 ∕ 16 (1.313) 1.062 1.775 0.030 0.940 8400 26 12.86 26.79 0.762 18.0 608 1 3 ∕ 8 (1.375) 1.087 1.836 0.030 0.940 8970 27 22.86 37.37 0.762 19.8 671 1 7 ∕ 16 (1.438) 1.144 1.929 0.030 0.953 9240 28 23.41 38.49 0.762 19.8 710 1 1 ∕ 2 (1.500) 1.228 2.049 0.030 1.008 10,365 29 23.41 39.06 0.762 19.8 750 1 9 ∕ 16 (1.563) 1.249 2.104 0.030 1.031 11,495 30 24.51 40.73 0.762 20.0 795 1 5 ∕ 8 (1.625) 1.351 2.241 0.030 1.063 12,800 31 25.06 41.85 0.762 20.5 850 1 11 ∕ 16 (1.688) 1.425 2.351 0.030 1.063 13,570 32 25.66 43.03 0.762 22.0 905 1 3 ∕ 4 (1.750) 1.499 2.461 0.030 1.125 14,300 33 25.91 43.84 0.762 22.3 950 1 13 ∕ 16 (1.813) 1.499 2.496 0.030 1.125 15,100 34 26.76 45.26 0.762 23.2 994 1 7 ∕ 8 (1.875) 1.593 2.625 0.030 1.125 15,900 36 28.81 48.47 0.762 25.1 1165 2 (2.000) 1.593 2.696 0.030 1.125 17,400 41 32.21 54.68 0.762 25.3 1579 2 1 ∕ 16 (2.063) 1.687 2.825 0.030 1.234 18,200 46 34.76 60.06 0.762 25.8 2067 2 1 ∕ 8 (2.125) 1.687 2.861 0.030 1.234 19,000 50 38.76 66.33 0.762 27.6 2512 2 3 ∕ 16 (2.188) 1.687 2.896 0.030 1.234 19,700 … … … … … … 2 1 ∕ 4 (2.250) 1.687 2.931 0.030 1.234 20,500 … … … … … … a From SAE Aeronautical Drafting Manual b Converted from SAE Aeronautical Drafting Manual. For details not shown, including material, see ANSI/ASME B107.100-2010 Wrenches
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