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8 & 10 cyl Bristol cars Type 407 onwards - restoration, repair, maintenance etc

411 wheel nut size

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Old 20-01-09, 10:16 PM
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Default 411 wheel nut size

anyone know what the wheel nut thread size is on a 411??

Thanks
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Old 20-01-09, 11:14 PM
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Quote:
Originally Posted by sjp63 View Post
anyone know what the wheel nut thread size is on a 411??

Thanks
9/16 BSF

Can I ask why you want to know?

Kevin
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Old 21-01-09, 07:50 PM
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Default 411 wheel nut size

The 412 (no reason to think that it is different from the 411) wheel nut
thread is 9/16 BSF (British Standard Fine) 16 threads per inch.
This is from memory and postings some years ago. Bit frosty outside but I
will recheck tomorrow.

John P
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Old 21-01-09, 09:46 PM
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Default 411 wheel nut size

if you are looking for a set of alloy wheel nuts as per factory i made my
own

peter dowdle
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Old 22-01-09, 12:24 AM
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It's probably worth mention that the nuts for the steel wheels are different to the nuts for the alloy Avon wheels. The nuts for the Avon wheels go through the wheel, so they are longer and come with a collar.

I bought some secondhand nuts and collars along with a secondhand Avon wheels from Bristol Cars Services. This was a few years ago and the nuts were £5 each (with collar) but they were in a sorry state. They are chromed originally and as you can imagine this doesn't wear very well, so once the chrome comes off they rust.

I was offered stainless steel nuts at the time that they use on the later V8 cars, but I felt £400 for a set of wheel nuts was a bit much.

At the time I looked into getting polished SS nuts made, but the demand wasn't sufficient to justify the tooling and set up costs.
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Old 22-01-09, 08:30 AM
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Default 411 wheel nut size

I have returned home after two weeks in the sun to kill off some of the
winter weather, however, I have not been pleased to read some of the items on the
forum.
First wheels do not come loose unless something fractures, they come loose
because they have not been fitted correctly! In most cases it is because the
wheel has not been located in its right position, that is not square and flat
on its central location, the nuts are tightened but are not fully home, thus
when the wheel rotates the wheel seats itself and low and behold the nuts are
loose.
The correct way to fit a wheel especially when the wheels have been off for
some time is to wire brush the wheel, its location and the studs to make
certain that they are perfectly clean. (the studs and nuts should also be washed
afterwards). The studs and wheel location should then have a thin smear of
grease (if this is not done to the wheel surfaces you can end up with a
creaking wheel), but above all make certain the wheel is correctly located before
the nuts are fully tightened home. If this is done they will NOT come loose.
My regards,
Bellerophon
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Old 22-01-09, 10:22 PM
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Default 411 wheel nut size

kevin as i mentioned i made my own wheel nuts and spacers

purchased propritory chrone mag wheel nuts from ant tyre service

drilled the threads out and re tapped to correct bsf thread

designed and made up on lathe correct tappered spacers had them platted

they work perfectly and look correct

regards peter dowdle
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Old 23-01-09, 02:05 AM
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Quote:
Originally Posted by peter dowdle View Post
kevin as i mentioned i made my own wheel nuts and spacers
Peter, that's an interesting way to do it, using existing nuts - I hadn't thought of that. One downside for myself and no doubt some others, would be the fact that we would also have to buy a lathe! Which probably means it would be cheaper to buy the SS nuts from Bristol.

Personally I took a slightly different route - I took the nuts and collars I had bought secondhand from Bristol, cleaned them up, had them nickel plated and polished. The polished nickel plate is a slightly different colour to chrome but it's much tougher, so it's less likely to crack and chip like chrome always seems to do eventually. I'm happy with the results - see (rather poor) picture attached.

If the price was reasonable however, I would go for polished stainless steel.

Regards,
Kevin
Attached Images
File Type: jpg wheel_nut.jpg (34.8 KB, 39 views)
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Old 23-01-09, 09:07 AM
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Default 411 wheel nut size

kevin

kevin the wheel nuts pictured are different than the ones I copied from
john mays 411 mk 5 , in that the distance they pertrude into the wheel ,
that is from the base of the washer to the bottom of the nut on his car
is .551 inch . Yours seems much shorter. I have a diagram that geoff drew
from johns car. The nuts I made when tightened almost touch the axle
stub. What all this means I am not sure !

peter dowdle
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