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Old 12-20-2012, 12:18 PM   #1 (permalink)
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Default Steering bolts sizes

Hi all, I'm rebuilding my steering for track use and want to replace the bolts holding the box and idler arm with some decent grade 10's just so i never have to worry about them again.
Does anyone know length and thread size/pitch for those bolts?
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Old 12-20-2012, 01:02 PM   #2 (permalink)
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Oh sorry - 1970 Mach 1
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Old 12-20-2012, 01:36 PM   #3 (permalink)
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Interesting! I've seen the bolts tear the frame apart, never seen the factory grade 8s fail!

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Old 12-20-2012, 02:05 PM   #4 (permalink)
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Wasn't sure they were grade 8 from the factory. Grade 8's would be fine for what I want - I was going to go with the highest grade I could get in that size. If the consensus is that the bolts would be fine for track use then I'll go with stock replacements.
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Old 12-20-2012, 02:08 PM   #5 (permalink)
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Yep- The OEM, and repro replacements, are grade 8. Any one of them could support the weight of the entire car.
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Old 12-20-2012, 02:58 PM   #6 (permalink)
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The only reason you'd have to go to a different grade would be to go
Grade 5 but in a larger diameter to get a greater yield strength and
material that is more malleable. It's extreme overkill though.
The ears actually snap off the steering box first before the bolts fail.
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Old 12-20-2012, 05:14 PM   #7 (permalink)
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Quote:
Originally Posted by 22GT View Post
Yep- The OEM, and repro replacements, are grade 8. Any one of them could support the weight of the entire car.
You could support many of these cars from a single 1/2!
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