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Unread 07-17-2009, 02:09 PM   #16
ratmonkey
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Quote:
Originally Posted by thaBrad View Post
I need them tonight, but thanks for the website. Plus they only had up to 3/8" and I need 1/2". Gonna call around for the serts! Thanks Arlo!
why are you using 1/2 13 bolts to attach a skid plate? that's way overkill.

3/8 is fine, 7/16 is more than enough. remember pressure on a skid plate is going in two directions, neither of them will be pulling down on the bolts and shear forces won't be too significant if you don't catch an edge on anything(which you shouldn't if you designed it well).

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Unread 07-20-2009, 09:55 AM   #17
thaBrad
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Quote:
Originally Posted by ratmonkey View Post
why are you using 1/2 13 bolts to attach a skid plate? that's way overkill.

3/8 is fine, 7/16 is more than enough. remember pressure on a skid plate is going in two directions, neither of them will be pulling down on the bolts and shear forces won't be too significant if you don't catch an edge on anything(which you shouldn't if you designed it well).
The existing holes in the frame were 1/2" so I was just using those and not trying to add more. Found nutserts at fastenal but they had to order. So I used Tek screws we have in the shop, we call them machos. Held good, but added more holes just like I didn't want. But at least they're small. Thanks guys, I'll get a pic up sometime.
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Unread 07-20-2009, 12:15 PM   #18
ratmonkey
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you actually want more fasteners, spreads out the forces on the frame better.
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'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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