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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Frame Rivet Size???

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Old Feb 9, 2021 | 05:23 PM
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Frame Rivet Size???

I came up empty searching online. Anyone know what size rivets hold our frames together? I'm looking to replace what needs it on my spring perches when the motor comes out this year.
 
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Old Feb 9, 2021 | 05:42 PM
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Seems like they are 7/16". at least that is what bolt size I replaced them with.
 
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Old Feb 12, 2021 | 07:12 PM
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Originally Posted by spurredon
Seems like they are 7/16". at least that is what bolt size I replaced them with.
Thanks! I recall putting half inch bolts in a 78' when I installed extended radius arms. I just can't remember if that required drilling to 1/2" or not. I might bump it to half anyways for the hell of it.
WILL REPORT BACK WITH PICTURES (it will be a while) . This weekend is going to be high flow fuel pumps in tank. That should keep you guys entertained for a little. Eyes out for a couple month old fuel pump thread, If interested.
 
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Old Feb 12, 2021 | 08:18 PM
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7/16 on mine. 1996 F250.
 
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Old Feb 13, 2021 | 06:54 AM
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Originally Posted by Bignasty2
I might bump it to half anyways for the hell of it.
I’m not sure how drilling a larger hole in the frame is better. The six 7/16” grade 8 bolts holding it on are more than strong enough.
 
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Old Feb 13, 2021 | 02:30 PM
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When I replaced mine, the holes seemed sloppy for a 7/16, so I opened them up for a 1/2" grade 8 bolt. The fit was better, and the fastener cost is pretty much moot.
 
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Old Feb 13, 2021 | 03:00 PM
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7/16 is dead nuts on.

On that note (and this you won't believe) --- pulled a 390 out of a truck recently and found 3/8-16 bolts holding the bell housing "on". For that application, the Ford Engineers originally called for 7/16-14 bolts -- how the H someone could thread this on (they were all the way in, still "in" there when I got to it --- LOL) is beyond my comprehension.

I'm sure the dirt and grease helped whoever thread those in, keep in place --- Maybe the earlier "mechanic" used some bubble gum to help "secure" - not sure.
 
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Old Feb 16, 2021 | 11:25 PM
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Found some common holes. 7/16s is the winner. Thanks guys

 
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