TM 10-4930-239-12&P Table G-1.  General Torque Requirements for Dry Fasteners* - Continued. Torque Requirement in lb ft (N.m) Bolt/Screw SAE Grade SAE Grade SAE Grade SAE Grade Size 1 or 2 5 6 or 7 8 1-8 UNC 235 (319) 590 (800) 660 (895) 910 (1234) 1-14 UNF 250 (339) 660 (895) 825 (1119) 990 (1342) 1-1/8-7 UNC 350 (475) 800 (1085) 1000 (1356) 1280 (1736) 1-1/8-12 UNF 400 (542) 880 (1193) 1050 (1424) 1440 (1953) 1-1/4-7 UNC, 500 (678) 1080 (1464) 1325 (1797) 1820 (2468) 1-1/4-12 UNF 550 (746) 1125 (1526) 1325 (1797) 1820 (2712) 1-3/8-6 UNC 660 (895) 1460 (1980) 1800 (2441) 2380 (3227) 1-3/8-12 UNF 740 (1003) 1680 (2278) 1960 (2658) 2720 (3688) 1-1/2-6 UNC 870 (1180) 1940 (2631) 2913 (3950) 3160 (4285) . 1-112-12 UNF 980 (1329) 2200 (2983) 3000 (4068) 3560 (4827) * Torque given is for clean, dry threads.  Reduce by 10% when engine oil is used as lubricant. Table G-2.  Locknut Breakaway Torque Values. NOTE To determine breakaway torque, thread lock nut onto screw or bolt until at least two threads stick out.  Locknut shall not make contact with a mating part.  Stop the locknut.  Torque necessary to begin  turning  locknut  again  is  the  breakaway  torque.    Do  not  reuse  locknuts  that  do  not  meet minimum breakaway torque. Thread Minimum Breakaway Torque Size lb-in. (N.m) 10-32 2.0 (0.23) ¼-28 3.5 (0.40) 5/16-24 6.5 (0.73) 3/8-24 9.5 (1.07) 7/16-20 14.0 (1.58) 1/2-20 18.0 (2.03) 9/16-18 24.0 (2.71) 5/8-18 32.0 (3.62) 3/4-16 50.0 (5.65) 7/8-14 70.0 (7.91) 1-12 90.0 (10.17) 1-1/8-12 117.0 (13.22) G-2