Ron N., At 13:42 10/12/99 -0500, you wrote: >>Would they be Whitworth threads by any chance? >Ah, yet another hole in my education. How about a short history lesson. > Ron N In 1841, Sir Joseph Whitworth (1803-1887) proposed a system of standardised screw threads. (More than likely the reason for his knighthood, though I'm not sure) It set out specifications for things like bolt diameter, pitch, cut(shape) and nut size. This development greatly aided the industrial revolution then taking place. Unlike modern inch size where you might grab a 1/2" wrench to tighten the 1/2" diameter nut on a 1/4-20 bolt, with WW you would simply grab a 1/4" wrench (actually spanner, since it _was_ England) to do the job. The actual size of the nut is often xx/64ths - i.e. usually between metric and inch size, as frustrated me mightily when I first started working under the bonnet of an MG TD. BTW, anybody need a set of WW sockets and open end spanners? ;-} Conrad Hoffsommer - Music Technician mailto:hoffsoco@luther.edu Luther College (319)-387-1204 Decorah, Iowa 52101-1045 Early to rise, and early to bed, makes a man healthy but socially dead.
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