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Re: [Healeys] Fuel gauge brass nuts BA?

To: Bert Van Brande <bertvanbrande@yahoo.com>
Subject: Re: [Healeys] Fuel gauge brass nuts BA?
From: Bob Haskell <rchaskell@earthlink.net>
Date: Sat, 13 Nov 2010 09:56:46 -0500

Yes, they're 4BA.

Bob Haskell
3000 Mk I registrar

On 11/12/2010 11:29 PM, Bert Van Brande wrote:
> Looking for the specification of the brass nuts on the signal posts of the 
>fuel gauge (where the electric wire attaches) for an original 100-4 gauge.  I 
>believe they're BA.  I measure an OD of 0.137" and since I don't have 
>BA/BSF/Whithworth gauges I estimated thread pitch around 38 TPI
> According to Wikipedia this brings it close to a 4BA   0.1417 in / 3.6 mm     
>38.46 TPI  So I measure 4 thou difference on the diameter.  Maybe wear or my 
> Can anybody confirm or correct my thinking?
> UK model engineering supplies still carry these nuts, not sure if there are 
>sources on this side of the pond but postage on a couple nuts will likely not 
>be too high.
> Bert
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