On 01/02/2021 20:24, Chuck Guzis via cctalk wrote: > Thank heavens that the Brits didn't come out with the 5150--we might > have had to deal with Whitworth (BSW) fasteners. Nah, too many of them are similar to UNC/UNF, which would have just caused confusion. We'd have used BA sizes. -- Pete Pete Turnbull