TM 5-3895-382-24 Torques for Metric Fasteners NOTICE Be    very    careful    never    to    mix    metric    with    U.S. customary   (standard)   fasteners.      Mismatched   or incorrect  fasteners  will  cause  machine  damage  or malfunction and can result in personal injury. Original fasteners removed from the machine should be saved for reassembly whenever possible.  If new fasteners are needed, they must be of the same size and grade as the ones that are being replaced. The material strength identification is usually shown on  the  bolt  head  by  numbers  (8.8,  10.9,  etc.).    The following chart gives standard torques for bolts and nuts with Grade 8.8. NOTE:   Metric    hardware    must    be    replaced    with metric   hardware.      Check   parts   manual   for proper replacement. Torques for Bolts and Nuts METRIC ISO² THREAD Standard Torque Thread Size Metric N· m ¹ lb ft M6 12 ± 3 9 ± 2 M8 28 7 20 5 M10 55 ± 10 40 ± 7 M12 100 ± 20 75 ± 15 M14 160 ± 30 120 ± 20 M16 240 40 175 ± 30 M20 460 ± 60 340 ± 40 M24 800 ± 100 600 ± 75 M30 1600 ± 200 1200 ± 150 M36 2700 ± 300 2000 ± 225 ¹1 Newton Meter (Nm) is approximately the same as 0.1 mkg. 2 ISO - International Standard Organization Torques for Taperlock Studs METRIC ISO² THREAD Standard Taperlock Stud Torque Thread Size Metric N· m ¹ lb ft M6 8 ± 3 6 ± 2 M8 17 ± 5 13 ± 4 M10 35 ± 5 26 4 M12 65 ± 10 48 7 M16 110±20 80 ± 15 M20 170 ± 30 125 ± 22 M24 400 ± 60 300 ± 45 M30 650 ± 80 480 ± 60 M36 870 ± 100 640 ± 75 1 Newton Meter (Nm) is approximately the same as 0.1 mkg. 2 ISO - International Standard  Organization Operation Section Torque Specifications 1-22