Mopar 5086683AA Bolt-HEXAGON FLANGE Head

[tjm]

Does anyone have any idea what the bolt spec is? Mopar is anywhere from $7 to $10 a bolt.

 

[bighammer]

Looks like they're just dif cover bolts. You could probably pull one out and find something close enough at a hardware store. Another option would be a junkyard.

 

[tjm]

Looks like they're just dif cover bolts. You could probably pull one out and find something close enough at a hardware store. Another option would be a junkyard.

yeah will have to measure i guess. hate that mopar just doesnt publish the type of bolt. effin scam. I asked an AI but they're still too dumb

 

[Ozymandias]

Without turning one out I'd say standard thread M8 flange bolt. You get em in Home Depot.

 

[sag2]

If you are unsure, use a grade 5 or grade 8, or the metric equivalent. Many hardware store bolts are grade 2.

 

[Ozymandias]

If you are unsure, use a grade 5 or grade 8, or the metric equivalent. Many hardware store bolts are grade 2.

Metric equivalent would be 8.8 or 10.9

Never use 12.9 except where they are mandatory by the manufacturer.
12.9 are brittle in a way and only to be used on special applications.
In the wrong position they fail where even an 8.8 lasts.

 

[tjm]

Thanks all

Bolt is a m8-1.25x22 category 10.9

a x25 actually fit in one hole of the rear diff housing

x22 is an odd length but you can find them on amazon

would post a link, tried but it doesnt seem to work well

 

[Ozymandias]

x20 is plenty long enough, everything that's above the diameter of the bolt is just margin and does not add to the strength of the connection.
In your case x10 is the shortest you should use there.

 

[Jim W]

When I was designing for Cat before my retirement the standard used for bolt engagement was 1.5 times the thread diameter. This was to prevent the bolt from striping out of the fastener hole if too short when being torqued. Measure the thickness of a M8-nut, this is all that is required for the clamping force to hold something tight. I doubt that has changed since then, but you never know.

Now in manufacturing most companies try and standardize on certain bolt diameters and length to allow min-max buys of material to obtain the most economical price from suppliers. So, this is why some fasteners are longer than needed for the job.

 

[tjm]

Thanks Everyone

Broken Bolt removed, new bolts installed. The 25mm length bolt fit all holes.