Grademark
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
A grademark normally consists of three symbols which indicate group, quality, and color. A letter is used to indicate group, a number to indicate quality, and a letter or letters to indicate color. For example, C2F means Lugs, second quality, and tan color.
[24 FR 8771, Oct. 29, 1959. Redesignated at 49 FR 16757, Apr. 20, 1984]
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