Roll bar and welded nuts on CP3/4

[TSM Locost]

Stainless bolts can't be used in stress points. 8.8 was min recommended for SVA and i assume for IVA.

A2-70 302 Stainless 7.0
A4-80 316 Stainless 8.0

[flyerncle]

If anyone is unlucky enough to roll a Haynes they probably wont be around to cut the roll bar off to repair it as the two points of contact with the road are the front frame of the chassis/rocker cover and top of roll bar.

[PorkChop]

I would think very carefully before making the rollbar a permanent installation. Removal of the fuel tank and the diff could be compromised if you aren't smart when you're placing the rear stays and the stays are going down to the lower part of the rear.

[voucht]

Thank you for your comments and ideas.

I thought stainless steel was harder than steel, so the grades were higher. wrong idea . But cool, now I know it isn't, and I will not do the same mistake a second time. Thanks!

I tried another hardware store which has more or less everything, and same : their 12.9 grade bolts are black, exactly as the ones I have. So I think I'm going to use these ones for now, and check how they last.

Originally Posted by jason 82

Quick thought, why don't you permanently weld the roll bar in ? If it gets rolled, cut the bar off, dress it up & re weld. Even cheaper & even more strength than using bolts.

Funny you wrote that on my thread the same day I wrote on another thread that I would not weld the roll bar because (as Porkchop says here too) of the fuel tank

Originally Posted by jason 82

they are for the roll bar, they won't be directly exposed to the elements anyway

Are you sure? I think they are pretty exposed to the elements: water/mud/salt from the wheels on the underside, and rain/sun (and snow ) on the top side.

But thanks for the inputs :-)