An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Sefcik, D.
(2013),
Package Testing Based on the Largest of the Declared Quantities, NIST/Office of Weights and Measures, [online], http://www.nist.gov/pml/wmd
(Accessed June 1, 2023)