Quantcast Table  C-2.  Torque  Limits  for  Wet  Fasteners

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TM 9-2350-287-34 C-3.  HOW  TO  USE  TORQUE  TABLE  (continued). Table  C-2.  Torque  Limits  for  Wet  Fasteners SAE  CAPSCREW  HEAD MARKINGS TORQUE SIZE SAE GRADE SAE GRADE SAE GRADE SAE GRADE No. 1 or 2 No. 5 No. 6 or 7 No. 8 DIA THREADS MM FOOT- FOOT- FOOT- FOOT- IN. POUNDS   N•m POUNDS   N•m N•m N•m PER INCH POUNDS POUNDS 1/4 20 6.35 4.90 6.10 7.20 9.76 9.00 12.20 10.80 14.64 1/4 28 6.35 5.40 7.33 9.00 12.20 - 12.60 17.08 5/16 18 7.94 9.90 13.34 15.30 22.54 17.10 23.18 21.60 29.27 5/16 24 7.94 11.70 15.87 17.10 23.18 - 24.30 32.95 3/8 16 9.53 16.20 21.97 27.90 37.84 30.60 41.49 39.60 53.69 3/8 24 9.53 18.00 24.41 31.50 42.71 - 44.10 59.80 7/16 14 11.11 25.20 34.17 44.10 59.80 49.50 67.12 63.00 85.42 7/16 20 - 27.00 36.61 49.50 67.12 - 70.20 95.19 1/2 13 12.70 35.10 47.59 67.50 91.53 76.50 103.73 94.50 128.14 1/2 20 - 36.90 50.04 76.50 103.73 - 108.00 146.50 9/1 6 12 14.29 45.90 62.24 99.00 134.24 108.00 146.45 139.50 189.16 9/16 18 - 49.50 67.12 108.00 146.45 - 153.00 207.47 5/8 11 15.88 56.70 76.89 135.00 183.06 150.30 203.80 189.00 256,28 5/8 18 - 85.50 1115.49 153.00 207.47 - 216.00 296.90 3/4 10 19.05 94.50 128.14 243.00 329.51 252.00 341.71 337.50 457.65 314 16 - 103.50 140.35 265.50 360.20 - 378.00 536.87 718 9 22.23 144.00 195.26 355.50 482.06 396.00 536.98 544.50 738.34 7/8 14 - 157.50 213.57 391.50 530.87 - 607.50 823.77 1 8 25.40 211.50 286.79 531.00 720.04 594.00 805.46 819.00 1110.56 1 14 - 225.00 305.10 594.00 805.46 - 891.00 1208.20 1 1/8 - 25.58 720.00 976.32 - 1152.00 1562.13 792.00 1073.97 1296.00 1757.52 1114 - 31.75 - 2221.11 2440.80 1318 - 34.93 - 1314.00 1781.82 - 2142.00 2904.57 1512.00 2050.29 2446.00 3319.47 1 1/2 - 38.10 - 1746.00 2367.54 - 2844.00 3856.50 1980.00 2684.88 3204.00 4344.66 C-4.   TIGHTENING   METAL   FASTENERS. When torquing a fastener, select a torque wrench whose range (Table C-3, p. C-4) fits the required torque value. A torque wrench is most accurate from 25 percent to 75 percent of its stated range. A torque wrench with a stated range of O to 100 will be most accurate from 25 to 75 foot-pounds. The accuracy of readings will decrease as you approach O foot-pounds or 100 foot-pounds. The ranges in Table C-3 are based on this principle. C-3

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