Jumpy Guy
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| posted on 14/3/09 at 11:53 AM |
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Bolts, threads and sva
Looking at my front suspension bolts started some debate here, I thought I'd ask here for some Bolt Guru...
How many threads should be showing through the nut? does this change if i use locking nuts?
Also, I'm using bolts that are threaded all the way. Are these ok, or should i replace with the 'shouldered' type?
lastly, I'm assuming i need HT bolts, is this true?
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mistergrumpy
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| posted on 14/3/09 at 11:58 AM |
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I was always taught 2 threads minimum to be showing when I was in the RAF. A bolt that's threaded all the way is called a set screw, I'd
personally go for a bolt (a shouldered type). You should go for 8.8 grade HT bolts minimum, yes. The grade will be stamped onto the heads. Stainless
are no good as these are only around the 8 grade.
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Jumpy Guy
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| posted on 14/3/09 at 12:08 PM |
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Thanks for quick reply
Can anyone reommend a mail order source for bolts?
need them asap!!
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panichat
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| posted on 14/3/09 at 12:10 PM |
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Namrick
at http://www.namrick.co.uk/
Dave
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tegwin
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| posted on 14/3/09 at 03:14 PM |
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Namrick are reallly expensive... their postage is painful as well...
Screwfix has a huge range of reasonable bolts (all start at 8.8)... Dont use them for suspension, but for everything else... they are cheap and do the
job very well...
You should have a local nut and bolt specialist locally... look in Yellow pages... they will be able to supply you with the more specialist bits and
pieces without a delay and without getting arse raped for postage!
------------------------------------------------------------------------------------------------------------------------
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foes
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| posted on 14/3/09 at 04:15 PM |
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I used namrick too, can't remember them being that expensive but it was 2 years ago 
good service tho i seem to remember.
[Edited on 14/3/09 by foes]
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Canada EH!
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| posted on 14/3/09 at 04:18 PM |
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Canadian and American aircraft require 3 threads showing with nylock nuts, grade 8 minimum for suspension and shouldered bolts. I purchased mine from
Aircraft Spruce and Specialty in US, very helpfull. www.aircraftspruce.com
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mads
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| posted on 14/3/09 at 06:40 PM |
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quote:
Screwfix has a huge range of reasonable bolts (all start at 8.8)... Dont use them for suspension, but for everything else... they are cheap and do the
job very well..
why not for suspension out of curiosity?
We gain knowledge faster than we do wisdom!
Life is not a journey to the grave with the intention of arriving safely in a pretty and well-preserved body, but rather to skid in
sideways, thoroughly used, totally worn out and loudly proclaiming... "f*ck, what a trip!"
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Mix
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| posted on 14/3/09 at 06:59 PM |
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Hi Mads
I'll probably get shot down in flames for this but ........... if your using 1/2" or 12mm bolts for suspension pivots on a seven type car
then they are already 'over engineered'. screwfix ones will be fine.
Regards Mick
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britishtrident
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| posted on 14/3/09 at 07:38 PM |
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8.8 is an HT grade and fine for just about anything on the car.
Only exception I would make is engine internals -- for moving parts such as conrod bolts or cam sprocket bolts you want the best you can get.
However beware bolts from unkown origins, bolts from the far east with fake HT grade markings are coming in from the far east and passed off as the
genuine article --- so I would advise buying from a reputable screwed fastener specialist such as Namrick than a pile it high sell cheap operation.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
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