TORQUE SIZE SAE GRADE SAE GRADE SAE GRADE SAE GRADE NO. 1 or 2 NO. 5 NO. 6 or 7 NO. 8 DIA. THREADS MILLIMETERS POUND NEWTON POUND NEWTON POUND NEWTON POUND NEWTON INCHES PER INCH FEET METERS FEET METERS FEET METERS FEET METERS 1/4 20 6.35 4.5 6.10 7.2 9.76 9.0 12.20 10.8 14.64 1/4 28 6.35 5.4 7.33 9.0 12.20 – – 12.6 17.08 5/16 18 7.94 9.9 13.43 15.3 20.75 17.1 23.18 21.6 29.27 5/16 24 7.94 11.7 15.87 17.1 23.18 – – 24.3 32.95 3/8 16 9.53 16.2 21.97 27.9 37.84 30.6 41.49 39.6 53.69 3/8 24 9.53 18.0 24.41 31.5 42.71 – – 44.1 59.80 7/16 14 11.11 25.2 34.17 44.1 59.80 49.5 67.12 63.0 85.42 7/16 20 – 27.0 36.61 49.5 67.12 – – 70.2 95.19 1/2 13 12.70 35.1 47.59 67.5 91.53 76.5 103.73 94.5 128.14 1/2 20 – 36.9 50.04 76.5 103.73 – – 108.0 146.45 9/16 12 14.29 45.9 62.24 99.0 134.24 108.0 146.45 139.5 189.16 9/16 18 – 49.5 67.12 108.0 146.45 – – 153.0 207.47 5/8 11 15.88 56.7 76.89 135.0 183.06 150.3 203.80 189.0 256.28 5/8 18 – 85.5 115.94 153.0 207.47 – – 216.0 296.90 3/4 10 19.05 94.5 128.14 243.0 329.51 252.0 341.71 337.5 457.65 3/4 16 – 103.5 140.35 265.5 360.02 – – 378.0 536.87 7/8 9 22.23 144.0 195.26 355.5 482.06 396.0 536.98 544.5 738.34 7/8 14 – 157.5 213.57 391.5 530.87 – – 607.5 823.77 1 8 25.40 211.5 286.79 531.0 720.04 594.0 805.46 819.0 1110.56 1 14 – 225.0 305.10 594.0 805.46 – – 891.0 1208.20 1-1/8 – 25.58 – – 720.0- 976.32- – – 1152.0- 1562.13- 792.0 1073.97 1296.0 1757.52 1-1/4 – 31.75 – – – – – – 1638- 2221.11- 1800 2440.80 1-3/8 – 34.93 – – 1314.0- 1781.82- – – 2142.0- 2904.57- 1512.0 2050.29 2448.0 3319.47 1-1/2 – 38.10 – – 1746.0- 2367.54- – – 2844.0 3856.5- 1980.0 2684.88 3204.0 4344.66 CAPSCREW HEAD MARKINGS Table F-2.  Torque Limits for Wet Fasteners TM 9-2815-237-34 Change 1 F-3/(F-4 blank)