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5. SPECIFICATIONS
Bolt Assembly Torque (ft-lb)
The torque values in the table are based on the use of lubricated threads.
Size (mm) Grade 8.8 Iron Grade 10.9 Iron Grade 12.9 Iron Aluminum
6 5 10 9 4
7 9 14 18 7
8 17 25 29 14
10 33 50 50 25
12 60 85 95 40
14 90 133 145 65
16 140 200 210 100
18 200 285 290 135
20 290 400
Standard Metric Bolt Dimensions and Grades
Metric - M8 - 1.25 x 25
M8 - 1.25 x 25
Major thread diameter in millimeters
Distance between threads in millimeters
Length in millimeters
Grade markings
8.8 10.9 12.9
5.3 FASTENER TORQUE SPECIFICATIONS
Metric Bolt Markings and Torque Values
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