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S rated bolts
corrado vr6 - 20/9/13 at 07:08 PM

Hi there, I'm refitting my harnesses on my Mk Indy before I go for IVA, originally I was using the bolts that came with the harnesses but these don't have 8.8 on the head but they do have an 's' on them, will these be ok or should I change them??

Cheers Greg

liam.mccaffrey - 20/9/13 at 07:31 PM

I thought s grade was for unf bolts. Are yours actually metric?

[Edited on 20/9/13 by liam.mccaffrey]

corrado vr6 - 20/9/13 at 07:48 PM

Strangely they fit my Mk chassis harness mounting points, so I'm not to sure without looking at them but they are out my lock up, I know they are a fine looking thread

westf27 - 20/9/13 at 09:11 PM

s rated i am sure are a little stronger than 8.8

paulf - 20/9/13 at 09:14 PM

Standard seat belt bolt size is 7/16 unf so will be S grade UNF.
Paul

corrado vr6 - 20/9/13 at 09:16 PM

So it sounds like the s rated bolts should be fine for mr IVA

iank - 21/9/13 at 08:58 AM

Yes, according to Namrick both S and 8.8 are the same specification 50-55 tons/in^2
http://www.namrick.co.uk/acatalog/tech-info.html

I don't think you can even get imperial bolts with metric grade markings.

ashg - 21/9/13 at 11:08 AM

quote:
Originally posted by iank

I don't think you can even get imperial bolts with metric grade markings.


not unless they are made in china

s is fine. same as 8.8 mine went through iva with 7/16th unf s bolts.