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Grade of bolts for the springs?

Discussion in 'OffRoad Design' started by UseYourBlinker, May 24, 2002.

  1. UseYourBlinker

    UseYourBlinker 1 ton status

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    What are the grade for the bolts that come in the greasable spring bushings? Front/ Rear?
     
  2. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    Eric, the greasable bushings you bought for the front of your blazer that I seen are grade 8 for the shackle and grade 5 on the front spring eye bolt. All grade 8 bolts have 6 lines on the head of the bolt and grade 5 have 3 lines and grade 3 have no lines.
     
  3. UseYourBlinker

    UseYourBlinker 1 ton status

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    Thanks Scott.
     
  4. ken

    ken 1/2 ton status

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    How many folks besides me have broken 1/2" grade 8 shackle bolts?? Welp, I did on my Suburban, and I wasn't even wheelin!! Makes me wonder about greaseable shackle bolts...being as they're hollow and all...
     
  5. Stephen

    Stephen 1/2 ton status Moderator Vendor

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    We have one other customer (that I know of) that has broken our bolt. And he does drive a tin-foil K5 and broke it in a mishap on one of the hammers if I remember the story right. If you broke one on the street there was something wrong with the bolt and you need a new one. Call us.
    We have tested these in tension and at about 150 ft-lb of torque the threads will break but the drilled shank holds up fine. There are companies out there that sell drilled GR5 7/16" bolts for this application, scary huh!
     
  6. jekbrown

    jekbrown I am CK5 Premium Member GMOTM Winner Author

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    well, if you are breaking grade 8 stuff, you can always get higher grade stuff. Its *way* spendy, but they do make hardware that has higher shear strength etc than grade 8. Me, I'd prolly just carry a couple of spare grade 8s...

    J
     
  7. 70~K5

    70~K5 1/2 ton status

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    Yep I'll carry a couple spare bolts could use them other places too.
     

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