Roll Bar Bolts

[Tatey]

Could anyone tell me how long the 8 bolts need to be for fixing the roll bar into place? I know they are M8 bolts, also what pitch of thread has everyone used?

Also, could someone give me a quick run down on what type of nuts/bolts to use?

I know that they bolts need to be at least 8.8 grade, can you get high tensile nuts?

Also for the bolts to be welded onto the seatbelt mountings and roll bar support, im guessing I will want zinc plates bolts as you can't weld stainless without changing the wire when using a mig?

What nuts need to be nylocs? Im guessing the roll bar and seatbelt mounting nuts can't be nylocs as the stuff will just melt when you come to weld it?

Finally does everyone just buy their nuts/bolts and washers from ebay? Does anyone recommend any suppliers?

Cheers
Tatey