Quantcast APPENDIX G TORQUE TABLE - TM-10-6640-239-13_436

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TM 10-6640-239-13 G-1/(G-2 blank) APPENDIX G TORQUE TABLE Section I.  INTRODUCTION G-1. GENERAL. Use a torque wrench to check torque or tighten nuts and capscrews to specified torque.  Special torque values are identified in the maintenance procedures.  Standard torque values shown should be used for other threaded fasteners.  Refer to table G1. STANDARD CAPSCREW MARKINGS AND TORQUE Current Usage Much Used Much Used Used at Times Used at Times Minimum Tensil Strength PSI MPa To 1-2-69,000 (476) To 3/4-64,000 (421) To 1-55,000 (379) To 3/4-120,000 (827) To 1-115,000 (793) To 5/8-140,000 (965) To 3/4-133,000 (917) 150,000 (1034) Quality of Material Intermediate Minimum Commercial Medium Commercial Best Commercial SAE Grade Number 1 or 2 5 6 or 7 8 Capscrew Body Size (Inches) - (Thread) Torque Ft.-Lb (N-m) Torque Ft.-Lb (N-m) Torque Ft.-Lb (N-m) Torque Ft.-Lb (N-m) 1/4-20 5(7) 8(11) 10(14) 12(16) -28 6(8) 10(14) 14(19) 5/16-18 11(15) 17(23) 19(26) 24(33) -24 13(18) 19(26) 27(37) 3/8-16 18(24) 31(42) 34(46) 44(60) -24 20(27) 35(47) 49(66) 7/17-14 28(38) 49(66) 55(75) 70(95) -20 30(41) 55(75) 78(106) 1/2-13 39(53) 75(102) 85(115) 105(142) -20 41(56) 85(115) 120(163) 9/16-12 51(69) 110(149) 120(163) 155(210) -18 55(75) 120(163) 170(231) 5/6-11 83(113) 150(203) 167(226) 210(285) -18 95(129) 170(231) 240(325) 3/4-10 105(142) 270(366) 280(380) 375(508) -16 115(156) 295(400) 420(569) 7/8-9 160(217) 395(536) 440(597) 605(820) -14 175(237) 435(590) 675(915) 1-8 235(319) 590(800) 660(895) 910(1234) -14 250(339) 660(895) 990(1342) 1. Always use the torque values listed above when definite specifications are not available. Note:  Do not use standard values in place of those specified in other sections of this manual; special attention should be observed when using SAE Grade 6, 7, and 8 capscrews. 2. The above is based on use of clean and dry threads. 3. Reduce torque by 20% if new plated capscrews are used. Caution:  Capscrews threaded into aluminum may require reductions in torque by 30% or more, unless inserts are used.


 


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