TM 9-2320-360-34-1 Table D-3.  Torque Limits for Dry Metric Fasteners CAPSCREW HEAD MARKINGS METRIC GRADE 8.8 METRIC GRADE 10.9 METRIC GRADE 12.9 DIAMETER TORQUE IN. MM LB-FT N· M LB-FT N· M LB-FT N· M 0.157 4 2 3 3 4 4 5 0.197 5 4 5 6 8 7 9 0.237 6 7 9 10 14 11 15 0.276 7 11 15 16 22 20 27 0.315 8 18 24 25 34 29 39 0.394 10 32 43 47 64 58 79 0.473 12 58 79 83 113 100 136 0.552 14 94 127 133 180 159 216 0.630 16 144 195 196 266 235 319 0.709 18 190 258 269 365 323 438 0.788 20 260 353 366 496 440 597 0.867 22 368 499 520 705 678 919 0.946 24 470 637 664 900 794 1077 1.064 27 707 959 996 1351 1235 1675 1.182 30 967 1311 1357 1840 1630 2210 Table D-4.  Torque Limits for Wet Flange Nuts DIAMETER TORQUE IN. MM THREADS PER INCH LB-FT N· M 1/4 6.35 20 15 20 5/16 7.94 18 25 34 3/8 9.65 16 45 61 1/2 12.70 13 110 149 5/8 15.75 11 210 285 SPIRALOCK FLANGE NUT MARKINGS GRADE 8 3/4 19.05 10 375 508 D-4  Change 1