Uh oh! ID this bolt?

[HoosierJeeper]

Just finished putting the rear driveshaft back on the KJ, backed it out, took it for a ride and got back and fold this bolt laying on the ground in the garage. It's about an inch long and the head is a 12mm. Any ideas on what it's from? Only took the 4 driveshaft bolts out of the KJ, and they're all there plus this one is smaller. Skid plate bolts are there. Not 100% sure it's from the KJ even, but thought maybe someone might recognize it.

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Thanks!

 

[Dave]

Spare bolt that rolled out of your tool box?

Dave

 

[TwoBobsKJ]

Possibly a bolt from the diff cover? Has the same type of flange but may be too long, not sure.

That happened to me when I was in high school and rebuilt the engine in my '73 Roadrunner. It had a 340 Six Pack and my dad told me to put all the nuts and bolts in separate containers by component (******, engine, etc.) because there were a lot of small linkages, nuts and bolts for the intake. Got all done putting everything back together and I had three medium size bolts sitting in a Maxwell House coffee can.

Dad: "Where do those bolts go?" I shrugged. "Good luck, boy."

When the oil pan started leaking he made me pay for the tow...


Bob

 

[Marlon_JB2]

Looks almost like a brake caliper pin bolt...

 

[LibertyTC]

Of course it is worth an inspection to see if any bolts are missing...

Possibly your tire may have picked up a bolt from somewhere and it finally dropped on the floor..
Don't remember ever seeing a "Max" bolt anywhere ..were you driving in the desert by chance? :gr_grin:
Link: https://www.youtube.com/watch?v=9L67BiENzYs

 

[tommudd]

Ever since you posted the first picture been trying to think where it may of come from. But no clue, what size is it, what size wrench fits it ?

 

[HoosierJeeper]

Looks almost like a brake caliper pin bolt...

Thought that too but I distinctly remember mine being 14mm.

Of course it is worth an inspection to see if any bolts are missing...

Possibly your tire may have picked up a bolt from somewhere and it finally dropped on the floor..
Don't remember ever seeing a "Max" bolt anywhere ..were you driving in the desert by chance? :gr_grin:
Link: https://www.youtube.com/watch?v=9L67BiENzYs

:gr_grin:
I crawled under it and didn't see any bolts like it or anything missing a bolt.

Ever since you posted the first picture been trying to think where it may of come from. But no clue, what size is it, what size wrench fits it ?

12mm head, about an inch long, moderately fine thread.

Thanks for the help so far, I'm thinking it's from something else. Nothing has fallen off the KJ...yet:gr_grin:

 

[uss2defiant]

too short for a brake caliper i think.
definitely not skid cause there's no washer.

 

[Cardhu]

you know your on an forum where people wrench when you get 8 responses to guess this bolt question?

Can't be a metric graded bolt like you'd see on the KJ with the # like that. Can't see i've seen one that ever said 9.0 nor max.

8.8, 10.9 etc sure. but 9.0?
ASTM, SAE and ISO Grade Markings for Steel Fasteners - American Fastener Technologies Corporation

 

[Dave]

I know.....that is a "Budke Bolt" I can tell because it's "One Nut Short of a Load".........:happy175::happy175::happy175:


Dave


(Only those that remember "Budke" will get this...):happy175:

 

[Royy]

It's the bolt that screws into the sliders on the front calipers. I just took mine apart, and thought those bolts looked familiar, then I remembered this post.

 

[uss2defiant]

it is 9.8 not 9.0.

I came across a youtube vid of replacing the u joint of the rear drive shaft on a KJ.
The bolts had the same 9.8 max marking on it but the bolt size was not the same.

 

[HoosierJeeper]

@uss2defiant[, thought that at first too but it's way smaller!
QUOTE=Royy;714071]It's the bolt that screws into the sliders on the front calipers. I just took mine apart, and thought those bolts looked familiar, then I remembered this post.[/QUOTE]

Mine has aftermarket bolts there, 14 mm head.

you know your on an forum where people wrench when you get 8 responses to guess this bolt question?

Can't be a metric graded bolt like you'd see on the KJ with the # like that. Can't see i've seen one that ever said 9.0 nor max.

8.8, 10.9 etc sure. but 9.0?
ASTM, SAE and ISO Grade Markings for Steel Fasteners - American Fastener Technologies Corporation

Maybe it's from the LR3 :happy175:

I know.....that is a "Budke Bolt" I can tell because it's "One Nut Short of a Load".........:happy175::happy175::happy175:


Dave


(Only those that remember "Budke" will get this...):happy175:

Maybe it's because my Jeep only has 1 qt of oil in it:happy175:


Thanks for all the help guys!

 

[TwoBobsKJ]

you know your on an forum where people wrench when you get 8 responses to guess this bolt question?

Can't be a metric graded bolt like you'd see on the KJ with the # like that. Can't see i've seen one that ever said 9.0 nor max.

8.8, 10.9 etc sure. but 9.0?
ASTM, SAE and ISO Grade Markings for Steel Fasteners - American Fastener Technologies Corporation

That's why I love hanging out here - people know what they're talking about :waytogo:

Bob

 

[Cardhu]

That's why I love hanging out here - people know what they're talking about :waytogo:

Bob

Why i'm still hanging around. You don't get that sense of community everywhere.

Even if that bolt is 9.8 and consistent with metric convention
https://www.fastenal.com/en/76/metric-system-and-specifications

9.8 = 900 MPa and 80% of 900 to yield strength;

I've still never seen one on the jeep no why they'd have spec a glorified 8.8

Last guess, what do the other bolts on your pinion yoke look like?

 

[HoosierJeeper]

Pinion yoke is on the diff end of the driveshaft right?

Those are a 15mm head. This one is a 12.

 

[Cardhu]

whatever it may be called it looks like this

Flange yoke, pinion yoke, The thingy the ujoint goes in on the rear of the driveshaft.

Despite the bolt size, does it have a "max" on it? I'm having jeep withdrawal and can't remember,

The above comment on the brakes does have a similar bolt on it, again, forgot sizes and don't remember a max as i replaced them years ago with a napa kit.

 

[HoosierJeeper]

Yep. The bolts for that are 15mm on my KJ.

 

[dude1116]

Random but what about the bolts for the harmonic balancer? AKA your Jeep's balls.

 

[Royy]

Random but what about the bolts for the harmonic balancer? AKA your Jeep's balls.

I'm pretty sure those are 15mm.