theres also alot of issues kicking about at the minute with regard to the use of stainless in critical components with regard to stress corrosion cracking in chloride atmospheres. The amount of grief this has caused me at Sellafield is untrue!!!!
I won't uses stainless fixings in suspension. Years ago I used to restore and modify Triumphs. I always used standard bolts on the suspension.
I'd done a suspension rebuild on a regular customers Spitfire. I used poly bushes and new standard grade bolts.
I got a call from this guy, most upset that his pride and joy had just broken a lower wishbone bolt. He'd had it recovered to his house so I went over for a look.
On inspection I noticed that all the lower wishbone bolts had been switched for stainless bolts. I asked why and who had changed the bolts.
He said, a mate of his thought it would look better, so they changed them between them.
I suggested that the bolts are the wrong grade for suspension and offered to put the correct bolts back in.
The local body shop then had the task of fixing the body damage!!
Like I said. I'd avoid stainless in suspension.