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STANDARD TORQUE VALUES - METRIC SYSTEM

 
  
 
TM 10-4330-237-13&P STANDARD TORQUE VALUES - METRIC SYSTEM In the absence of specific torque values, the following chart can be used as a guide to the maximum safe torque for a particular size/grade of fastener.  There is no torque difference for fine or coarse threads.  Torque values are based on clean, dry threads.  Reduce value by 10% if threads are oiled before assembly. Relative Strength Marking 4.6 4.8 8.8 or 9.8 10.9 12.9 Bolt Markings Dia. Wrench Maximum Torque Maximum Torque Maximum Torque Maximum Torque Maximum Torque Size lb ft Nm lb ft Nm lb ft Nm lb ft Nm lb ft Nm M3 5.5mm .3 .5 .5 .7 1 1.3 1.5 2 1.5 2 M4 7mm .8 1.1 1 1.5 2 3 3 4.5 4 5 M5 8mm 1.5 2.5 2 3 4.5 6 6.5 9 7.5 10 M6 10mm 3 4 4 5.5 7.5 10 11 15 13 18 M8 13mm 7 9.5 10 13 18 25 26 35 33 45 M10 16mm 14 19 18 25 37 50 55 75 63 85 M12 18mm 26 35 33 45 63 85 97 130 111 150 M14 21mm 37 50 55 75 103 140 151 205 177 240 M16 24mm 59 80 85 115 159 215 232 315 273 370 M18 27mm 81 110 118 160 225 305 321 435 376 510 M20 30mm 118 160 166 225 321 435 457 620 535 725 M22 33mm 159 215 225 305 435 590 620 840 726 985 M24 36mm 203 275 288 390 553 750 789 1070 926 1255 M27 41mm 295 400 417 565 811 1100 1154 1565 1353 1835 M30 46mm 402 545 568 770 1103 1495 1571 2130 1837 2490 H-4


   


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