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Bolt Size for Springs

Discussion in 'The Garage' started by 79Stomper, Apr 22, 2004.

  1. 79Stomper

    79Stomper 1/2 ton status Premium Member GMOTM Winner

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    A question. What size bolts, ie length. thread, and diameter, do i need to replace the ones currently on my truck? New kit didn't come with any and want to get some more with the poly lock nuts to put on when I start the lift tomorrow. Thanks

    JIMBO
     
  2. 55Willy

    55Willy 3/4 ton status

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    what springs and what bushings?
     
  3. 79Stomper

    79Stomper 1/2 ton status Premium Member GMOTM Winner

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    Just need the bolt sizes for the springs. Stock replacement I would guess. It is for the Rough Country 6" lift.
     
  4. 55Willy

    55Willy 3/4 ton status

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    I'll pass since mine aren't stock anymore. Mine are now 9/16" and 5/8"


    for stock fronts i think it is 7/16" for the shackle and 1/2" for the front eye 4.5" long.
    rear springs are both 1/2" I believe.

    I used grade 5's that were then drilled out for grease fittings.
     
  5. 84_Chevy_K10

    84_Chevy_K10 Banned

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    The bolts are 9/16-18 fine thread in the rear springs in all three locations. 4 1/2" long sounds about right.

    Up front the stock bolts are 9/16-18 in the front of the springs and 7/16-20 in the shackles from the factory, similar in length. The exception to this is 88-91 trucks which use 1/2" bolts in the rear of the front springs.

    My factory bolts were grade 8s, not sure on others.

    9/16" bolts are not a standard size so they're kind of a pain in the ass to find. I paid $3 each for mine when I got them. /forums/images/graemlins/eek.gif /forums/images/graemlins/yikes.gif
     

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