I think it unlikely that an American small thread would be used on a
British built car with a unit starting life in the 1950s.
If your #4-48 nuts appears to fit then it is much more likely that the
correct one would be 6 BA
The difference is very small
4-48 6BA
TPI 48 47.85
O/D 0.112" 0.1102"
BA fixings are still available in the UK but the even sizes are more
readily available that the odd.
3BA, 5BA & 7BA are used on many early Lucas products and these are a
little more difficult but I know of two UK suppliers who keep good
stocks and offer a very quick turnaround. Prices of odd sizes are a
little high with steel nuts around 4 pence each and a typical screw
around 7 pence UK prices.
Regards
>The mysterious thread you are asking about is a #4-48. I have run across this
>same thread other places on the Healey. If you can not find nuts with this
>thread, let me know. I know we are on opposite sides of the ocean, but I have
>extras that I could send to you if need be.
>Ken Mason
>BJ7 in work
> ----- Original Message -----
> From: P.J.Aeckerlin<mailto:j.aeckerlin@tiscali.nl>
> To: Healeys<mailto:healeys@autox.team.net>
> Sent: Friday, August 25, 2006 10:41 AM
> Subject: Fuel sender nut
>
>
> This time a question for my British Healey friends. I just discover that
> a little nut is missing from my fuel tank gauge sender unit. It's the
> nut under which the cable is clamped. I've emptied all my jam jars with
> peculiar nuts and bolts but nothing fits.
> I'm afraid the thread is something like BA thread, and in my view the
> only opportunity to get a BA threaded nut that small (the o/d of the
> thread is just over 3 mm or 120 thou) is to ask someone in the UK to
> empty their jam jar(s) and see whether they can find one, JUST ONE, nut
> that would help me out of my problem.
> Any reaction will be appreciated.
> Kind regards, and thanks in advance!
> Jack Aeckerlin, The Netherlands
> 1964 BJ8 29432 starting to look like a Healey
>
--
John Harper
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