In article Nk38i.71499$g63.42617@edtnps82,
Homer J Simpson wrote:
We're fairly used to UNF and UNC in the UK as they were much used on
cars before metric came in - but only really in the larger sizes. For
small stuff Lucas ;-) stuck to BA.

I started off with Whitworth, and later BA. Then we went to metric.

I'd have thought BSW 'equivalents' to the smaller BA sizes rather rare?

--
*How much deeper would the oceans be without sponges? *

Dave Plowman London SW
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