front bumper bolts

[USAFXJ]

no grade, thats just a cut paste directly from my email.

 

[rguignard]

ok i would have someone help you put that bumper on it might be heavy

 

[USAFXJ]

its like 45lbs, and I have a buddy who will help. He has a garage that we can use to hang the bumper to paint.

 

[jcroffroad]

We use Grade 5 for all the bolts expect for replacement steering box bolts, which we use Grade 8 for that.

 

[x2elite]

There it is guys.... straight from the man! Thanks for stopping in and setting the record straight.

 

[monkeyevil]

Using grade 8's and not installing tie-in brackets seems counter productive. Any pull on the bumper strong enough to sheer or bend a grade 5 bolt means you should have tie-ins (or tighter installed bolts.) We bump up the front two uni-frame holes to 7/16 because this allows you to remove the factory 10mm nut clips, and they fill the hole left nicely.

Also with the kinds of torque necessary to securely fasten the tie-in brackets or bumpers to the uni-frame, grade 5 bolts are more than adequate. We use grade 8 bolts on the steering box because of all the loads associated with it.

 

[monkeyevil]

dont use grade 8 bolts in a bumper theres no bend they just sheer off if you put the right force to them the grade 5 bolts will bend before they brake. 10 mmis the size if the bolts not the head lol mine were 10mm in both frt and rear bumpers. i think x2elite is right about calling JRC and asking them!

A grade 8 bolt will always be stronger in both sheer and bending. Your correct a grade 8 bolt doesn't bend much before it breaks... but at the point the grade 8 bends the grade 5 would be long destroyed. It's all a mute point anyway, because if you ever have the chance to notice a bent bolt when it's installed, that bolt is in the improper application or improperly installed.

With all hardened bolts any nicks or chips will cause a stress riser and ultimately a failure. Inspect your critical bolts closely.

 

[USAFXJ]

We use Grade 5 for all the bolts expect for replacement steering box bolts, which we use Grade 8 for that.

thank you thank you, and sorry for blowing up your email .

 

[rguignard]

its nice when someone WHO KNOWS comes on and sets the record straight thank you

 

[USAFXJ]

I know, I am glad he came on and straightened it all out.

 

[BDR-TX]

its nice when someone WHO KNOWS comes on and sets the record straight thank you

Yes, isn't it.

 

[xxmidianxx]

Those darn "know it all" people..... lol

 

[Only In A Jeep XJ]

The cheapest and best selection here in G-ville is the Tractor Supply. They sell their bolts by weight, not quantity and will save you a bunch. I guess it would be $5-$10 for the bunch, Bolts, Washers and nuts.

 

[USAFXJ]

thanks, I will go check it out.