Locking Nuts v. FLanged Nuts

dukeboy_318 said

As a defense contractor working on the engineering side of projects that can only use mil-spec parts, the bolded is false. We source from a variety of manufacturers, all mil-specs have a replace recommendation at 5 years. and it says right on the spec sheet, 1 time use only.

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What Mil spec says they can only be used once? And is it because of what an engineer put on a drawing, or does the spec itself tell you not to reuse them? I do not have any specs in front of me, but I will when I'm at work Monday, and I'm going to let you know what MS-21044 and NASM-17830 says. So is McMaster-Carr lying to the world about re-usability?
McMaster-Carr