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Torque Settings _Imperial Bolts_

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					               Tightening Torques and Induced Bolt Tension
                                Grade 8 Bolts
               Tightening Torques and Induced Bolt Tension for
                               Imperial Bolts
                                                  To AS2465 (Grade 8)
                                                 UNC                                        UNF
           Diameter               Torque            Bolt Tension               Torque              Bolt Tension
                                   ft.lbs                lbs                    ft.lbs                  lbs
                ¼                    10                 2470                      12                   2830
               5/16                  21                 4100                      23                   4520
               3/8                   38                 6050                      43                   6830
               7/16                  60                 8320                      67                   9230
                ½                    92                11050                     104                  12500
               5/8                  183                17620                     207                  19960
                ¾                   325                26070                     363                  29120
               7/8                  523                36010                     577                  39720
                1                   785                47200                     859                  51740



                                                  Grade 5 Bolts
               Tightening Torques and Induced Bolt Tension for
                               Imperial Bolts
                                                  To AS2465 (Grade 5)
                                                 UNC                                        UNF
           Diameter               Torque            Bolt Tension               Torque              Bolt Tension
                                   ft.lbs                lbs                    ft.lbs                  lbs
                 ¼                    7                 1760                       8                   2020
               5/16                  15                 2890                      17                   3190
                3/8                  27                 4290                      30                   4840
               7/16                  43                 5880                      48                   6570
                 ½                   66                 7870                      74                   8840
                5/8                 130                12480                     150                  14170
                 ¾                  230                18400                     260                  20610
                7/8                 370                25550                     410                  28150
                 1                  560                33480                     610                  36660

      Recommended Assembly Torque to give Induced Preload Equal to 65% of Yield Load.
            Induced Bolt Preload or Tension Corresponding to 65% of Yield Load.


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posted:2/18/2012
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