Normal zinc plated bolts have bacically no corrosion resistance, so when replacing bolts before to stop corrosion and ultimately seizing, I have used A2 grade stainless steel, but I have been told A2 isn't strong enough for critical suspension components that use 8.8 steel bolts.

So can anyone suggest a material that is strong enough, whilst having enough corrosion resistance to stop seizure?

Or am I going to have to use the old favourite of slathering 8.8's with lots of copper grease.

I did find the website raceboltuk.com which sells stainless, and titainium bolts, but nowhere does it actually say what applications it's bolts can be used for(although the name racebolt suggests that they should be strong enough) I just wanted your opinions.

According to this you need A4 stainless bolts to be equivalent to 8.8

Thanks, I always wondered what the difference was between A2 and A4

A4 is readably avaliable and realtively cheap, so I'll go with that (I didn't fancy paying £15.60 for 1 titainium bolt)

A4 is the minimum grade required for corrosion resistance in marine applications, especially if submerged in salt water. 

Edited 26 December, 20214 yr by Warrior193
Typo

16 hours ago, Warrior193 said:

A4 is the minimum grade required for corrosion resistance in marine applications, especially if submerged in salt water. 

And the grade we used when I worked for a company in the potable water industry.