Paging them wot knows about bolts.

I have a bolt that is now knackered which has 3 F and 8.8 written on the
head. I have a pile of stainless bolts with F S and A2-70 written on the
head.

What I need to know is, is the stainless bolt suitable for the intended
application? I don't want to use a bolt that aint up to the job.

 

What's the application?

 

It's the two bolts that hold the top plate for the front shocker on a Vespa
front fork. So it will be taking a fair pounding I would imagine.

 

Grade 8.8 steel bolts have a tensile strength of 788 newt-mm2; A2-70
stainless is 700 newt-mm2.

I'd have no qualms about using the stainless. Your Vespa will have bags
of tolerance.

 

Should be no problem, there's about 10% less tensile strength (in theory)
between the two bolts and the design will have 100% tolerance.

 

But, it's worth noting, not the same high tensile.

 

Using the patented Mavis Beacon "Hunt&Peck" Technique, Dave Emerson

Tolerance? On a Vespa? Shurely Shome Mishtake?

--
Wicked Uncle Nigel - Manufacturer of the "Champion-105" range of rearsets

WS* GHPOTHUF#24 APOSTLE#14 DLC#1 COFF#20 BOTAFOT#150 HYPO#0(KoTL) IbW#41
ZZR1100, Enfield 500 Curry House Racer "The Basmati Rice Burner",
Honda GL1000K2 (On its hols) Kawasaki ZN1300 Voyager "Oh, Oh, It's so big"

 

It was somewhere around Barstow, on the edge of the desert, when the

And the disturbing tendency of SS bolts to crack; not a good idea for a
damper mounting. I've never had an SS bolt fail on me this way, but I'd
err on the side of caution rather than just use what was rattling around
in a box of odds'nsodds.

Especially when the OP could buy the proper bolts for tuppence from a
decent bolt stockist.

--

Dave

GS 850 x2 / SE 6a
SbS#6 DIAABTCOD#16 APOSTLE#6 FUB#3
FUB KotL OSOS#12? UKRMMA#19 COSOC#10

 

This is the kind of thing I was concerned about. I was hoping to get on
with its resto over the weekend but I might just lie down and take a rest.