jeremy ardley wrote: >>>>> Or is "metric" one of these things spared by the >>>>> Brexit Bonfire? >>>> >>>> It depends which gear your camp is since the metric >>>> system is partly implemented and partly co-exists >>> >>> British Standard Pipe still in use for plumbing and 1/4", >>> 3/8" of specification I forget for camera mounts. >> >> Boxing gloves, drums ... > > The British o-ring standard BS was based on inch > measurements. It was then adapted so all measurements are in > mm to precision 0.1 mm > > This standard is now adopted in the US by the SAE. > > So if you buy an o-ring in the US you will get a metric > precision ring certified by the SAE who derive it from the > British BS measurement which itself is metric, which in turn > is derived from nominal inch measurements e.g. 3/32"
Haha case closed :) -- underground experts united https://dataswamp.org/~incal
