Bumperette Bolt Size

[RWBeringer4x4]

Hey all,

Put this in the Clustertruck thread as well, but since I can't find this anywhere, I thought I'd start it with a more "searchable" title for anyone's future reference.

Does anyone know the size/thread pitch for the stock bumperette holes in the rear crossmember/bumper?

I've checked the nuts and bolts thread, Coolerman's spreadhseet, SOR, and CCOT, and I can't find an answer. Everything just says "bumperette bolts" without further description.

Hoping to pick up a rear tube bumper that mounts to these in a couple weeks, and will need the hardware.

 

[Chamba]

M 10 x 1.25 I believe.... Or M8 x 1.25. Now that I think about it, almost certain M 8.

 

[RWBeringer4x4]

I'm guessing probably a 30 or 40mm length?

 

[Chamba]

I'm guessing probably a 30 or 40mm length?

Will depend what you're bolting to it. I've got bumperettes and light guards and I'm using 1.5" length but have threads sticking out in back. There is nothing to hit with a long bolt so longer is not a bad thing.

 

[RWBeringer4x4]

Will depend what you're bolting to it. I've got bumperettes and light guards and I'm using 1.5" length but have threads sticking out in back. There is nothing to hit with a long bolt so longer is not a bad thing.

Ordered up some M8's and M6's tonight - gonna need them anyway. I will confirm your suspicions when they (and the bumper) arrive.

 

[swelltimes]

What'd you end up finding for bolt size? I'm about to put some bumperettes back on, would love to learn what you used.

Thanks!

 

[RWBeringer4x4]

Oh man...this was a couple months ago at this point. I am (almost) certain they were M8 bolts. The ones I bought were about JIS heads, 1.0 - 1.25in long. I picked them up from McMaster-Carr. I have the receipt but I also ordered some M6 bolts at the same time - so that would be my second guess...Next time I'm down by the truck I'll try to remember to confirm for you. Might be a while though, since it insists on snowing every 3 days... I'm about 99% sure they were M8's though.

Here are the details copied directly from the receipt:


Nonmarring Class 10.9 Flange Head Cap Screw, Steel, M8 Size, 30MM L, 1.25MM Pitch, Fully Threaded, packs of 50
Part Number was: 98093A548http://www.mcmaster.com/nav/enter.asp?partnum=98093A548

Hope this helps


Also - be VERY careful tightening them, the captured nuts on mine were pretty corroded and one stripped out without putting any real significant torque through it. I've heard this is a common problem.

 

[swelltimes]

That's great, thanks! I've got to drill out and retap a bolt that's snapped off in one of the holes from the PO, but I'll be sure to heed your advice on torque. Thanks again.

 

[Tools R Us]

... M8 x 1.25. ...

^^^ This.

 

[Living in the Past]

Is it just me or do the holes pictured in the first post look offset from each other? Should be inline top to bottom for bumperettes.

 

[RWBeringer4x4]

Is it just me or do the holes pictured in the first post look offset from each other? Should be inline top to bottom for bumperettes.

It's a camera trick - that is my truck and I can tell you with absolute certainty that they're in line.

 

[Coolerman]

Added that to my spread sheet. 8mm x 1.25 pitch x 30mm long JIS 12mm head.
Just so everyone knows: The spread sheet had not been updated on the server in quite a while but I had been updating it on my local drive. I just posted the newest version to the web server. You may want to update your copy as the new file was 8K larger than the old file. This means a lot of stuff has been added or updated.

Enjoy!

 

[RWBeringer4x4]

Added that to my spread sheet. 8mm x 1.25 pitch x 30mm long JIS 12mm head.
Just so everyone knows: The spread sheet had not been updated on the server in quite a while but I had been updating it on my local drive. I just posted the newest version to the web server. You may want to update your copy as the new file was 8K larger than the old file. This means a lot of stuff has been added or updated.

Enjoy!

Awesome! Thanks - it is good to see you prowling the forums again.

 

[Coolerman]

Awesome! Thanks - it is good to see you prowling the forums again.

Yeah, IH8MUD is like an addiction your fighting: You can stay away for a while but it gets you back in the end...

 

[Fast Eddy]

Yeah, IH8MUD is like an addiction your fighting

I don't think you're fighting too hard bro.

 

[MtnAddict]

Reviving an old thread. Anyone ever try these or any other hardware from them?

Bumperette Rear Bumper | Marine Grade Stainless | FJ40

(8) Piece Kit Includes: Quantity (8) JIS B1187 B Hex SEMS Bolts with Captured Split Washer and Flat Washer Only Source for OEM Style Indented Heads Marine Grade A4-70 (316) Stainless Steel Lab Tested and Confirmed Superior to Typical A2 Stainless Hardware in Corrosion Resistance Custom Made to...

www.overlandmetric.com

 

[73FJ40]

Reviving an old thread. Anyone ever try these or any other hardware from them?

Bumperette Rear Bumper | Marine Grade Stainless | FJ40

(8) Piece Kit Includes: Quantity (8) JIS B1187 B Hex SEMS Bolts with Captured Split Washer and Flat Washer Only Source for OEM Style Indented Heads Marine Grade A4-70 (316) Stainless Steel Lab Tested and Confirmed Superior to Typical A2 Stainless Hardware in Corrosion Resistance Custom Made to...

www.overlandmetric.com

Great products and excellent customer service.

 

[Chungas Revenge]

Top notch..

. Anyone ever try these or any other hardware from them?

 

[MtnAddict]

Great products and excellent customer service.

Top notch..

Thanks guys!