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Torque Ratings for Grade 5 and Grade 8 Fasteners - Jeep 4x4

Torque Ratings for Grade 5 and Grade 8 Fasteners

All Jeep Vehicles


Torque Specifications

To determine what fastener is right for the job, you must be able to identify what grade fastener and torque rating you are using. Fasteners are graded by tensile strength and are easily identified by the number of slash marks on the head of the fastener. Torque is measured in foot pounds.

  • Grade 5 fasteners have 3 lines or markings on the head resembling the shape of a “Y"
  • Grade 8 fasteners have 6 lines or markings on the head as displayed in the figure below
  • THREAD SIZESAE GRADE 5
    75% YIELD STRENGTH (PSI) =69000
    SAE GRADE 8
    75% YIELD STRENGTH (PSI) = 98000
    PLAIN
    Ft. Lbs.
    ZINC PLATED
    Ft. Lbs.
    PLAIN
    Ft. Lbs.
    ZINC PLATED
    Ft. Lbs.
    1/4 - 209101314
    1/4 - 2810121516
    5/16 - 1819212729
    5/16 - 2421233033
    3/8 - 16 33374752
    3/8 - 24 38425459
    7/16 - 14 53597683
    7/16 - 24 60668593
    1/2 - 13 8290116127
    1/2 - 20 92101131144
    9/16 - 12 118129167184
    9/16 - 18 131144186205
    5/8 - 11162179231254
    5/8 - 14 184202261287
    3/4 - 10 288317409450
    3/4 - 16322354457503


    Courtesy of Tom Woods
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