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Old 02-25-2009, 11:09 AM   #1
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What grade bolts for suspension?

I'm replacing all the rear suspension bushings, including the entire driver side knuckle. i was there yesterday (lowes) and looked at what they had. They have grade 8 standard and class 8.8 metric. Class 8.8 seems to be around the ballpark of grade 5. I like the metric because all of the nuts on the new factory knuckle are tack welded so its a perfect fit...downfall is that they arent as strong.

Recommendations?

And no i'm not buying ford bolts...$12 for 2 here, insane. and i need what...3 per side?


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Old 02-25-2009, 12:24 PM   #2
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Just go w/ the grade 8, they are super strong and will w/stand what you need them for.
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Old 02-25-2009, 12:38 PM   #3
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Go with what fits! Grade 8 is SAE, 8.8 is metric. 10.8 is equivalent in strength to grade 8. If you're replacing the control arm bushings and bolts you'll need 6 per side...3 arms w/2 ends=6x2 is 12 total. I'm getting ready to do the full set, front and rear.

Oop! sorry, I meant 10.9...
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Old 02-25-2009, 12:42 PM   #4
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you cant use a std bolt in a metric nut.... lol

I would get class 10.9, most of the stock ones are 10.9 and some are even 12.9
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Old 02-25-2009, 12:44 PM   #5
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find 12.9 if you can...

they are worth the extra price and i would go with the extra piece of mind
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Old 02-25-2009, 02:23 PM   #6
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the ford bolts also have a special anti-corrosion anti-sieze coating (though the anti-sieze clearly does NOT work for the rear lca's lol)
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Old 02-25-2009, 03:38 PM   #7
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yea id like to find a metric because like i said i like that all the nuts are tack welded and thats simply less i have to buy. so 10.9 and 12.9 are my good options. I'll resort to the standard if i find no luck with the metric...

So what do you guys think, the 8.8 is too weak for what i need?
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Old 02-25-2009, 03:39 PM   #8
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yea id like to find a metric because like i said i like that all the nuts are tack welded and thats simply less i have to buy. so 10.9 and 12.9 are my good options. I'll resort to the standard if i find no luck with the metric...

So the 8.8 bolts out of the question i take it?
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Old 02-25-2009, 03:44 PM   #9
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8.8 are so

they have their place but IMO suspension components are not it
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Old 02-25-2009, 07:55 PM   #10
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ok thanks for your help, 10.9+ it is!
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