School me on bolt grades....

[sweetk30]

Nylock I can see failing, hate those things... but even hardened lock washers, i.e. grade 8 or the like, you see them fail?

-- A

dont like them under heavy loads thay can spit out . hell half of them these days spit out trying to tighten the stuff down. i just go with stoke / metel crimp nuts and never look back. thats the same stuff the factroy used so good for me.

and half the hardware that places include these days looks like china crap i toos it and use my own stock reuse stuff or new from local supply house i buy from that gives me killer deals over gen hrdware store prices.

 

[dremu]

Oh... My mistake.

I thought it was Brit's, not Canadian's...

The one is more closely descended from the other than we are, so it's both, actually.

-- A

 

[6.2Blazer]

I was in class yesterday, and the instructor was giving a lecture on 'direct replacement' and why you do it....


I had NO idea that a grade-8 bolt had LESS shear strength, but more longitudinal strength...


Is this true?

And why>?

The instructor was incorrect. The grade 8 has more shear strength than an equivalent size grade 5 bolt. The shear strength is a percentage of the tensile strength and grade 8's have a higher tensile strength. This is a fairly common misconception and due to a grade 5 bolt typically just bending when it fails where as a grade 8 will typically snap in two, though it will be a much higher load when the grade 8 fails.

 

[Deuling]

Another reason lock washers are bad, at least on suspension parts is that they will rust out (if your in the rust belt) and then there is a space for stuff to wiggle around and cause problems. Steel locknuts for the win,

 

[shady]

I think its funny when your in a class put on by Fastenal (who sells them) and they tell you NOT to use split ring lockwashers. they recomended the crimped steel nut or loctite.

 

[sweetk30]

I think its funny when your in a class put on by Fastenal (who sells them) and they tell you NOT to use split ring lockwashers. they recomended the crimped steel nut or loctite.

more money for both .