[Healeys] BA taps

Alan Seigrist healey.nut at gmail.com
Wed Oct 26 21:27:29 MDT 2022


Yeah, my A90's trafficator is full of weirdo BA screw sizes.  I ended up
buying a full tap kit a few years ago to deal with it.

On Thu, Oct 27, 2022 at 6:16 AM mike brooks via Healeys <
healeys at autox.team.net> wrote:

> BA taps, nuts, bolts, set screws etc are still readily available in the
> UK, mainly because they are much used by model makers. RGD Tools in
> Yorkshire have all the taps. There are several vendors stocking nuts and
> bolts. As a matter of interest I read somewhere that instrument makers like
> Smiths deliberately used the uncommon odd numbered BA threads like 3BA,
> when 2BA and 4BA were the common sizes. The set screws holding the fuel
> gauge sender unit is another example of 3BA.
>
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