Of Matthew Zotter >I had asked NIST if there was a standard like FS 376B >for non-metric, and the following is what they said:
>There is no�Federal Standard for customary units because the >use of those units�reflect the measurements used in the marketplace. >There are some specific methods of sale for customary units in >NIST Handbook 130 Thanks. Conversion factors are listed so this must mean that customary units are controlled by government. It would be very odd if they were not controlled somewhere. A brief examination reveals differences between precision in FS376B and Handbook 130. For example FS376B says an ounce is 28.34952 g whereas Handbook 130 says it is 28.3495 g. Thus either FS376B is the superior source (for at least that unit) or there is a third document that we don't know about. See page 84 of: http://ts.nist.gov/ts/htdocs/230/235/h130-03/07_IV_PackLabReg.pdf and page 13 of: http://ts.nist.gov/ts/htdocs/200/202/fs376-b.pdf
