CFR›Title 7›Subtitle B›Chapter I›Part 51›Subpart D›Subject Group Grades ContainsSections 51.620–51.627CorpusDaily eCFRDisplayed edition2026-09-01Last updated2026-09-01 Sections 51.620 § 51.620 U.S. Fancy. 51.621 § 51.621 U.S. No. 1. 51.622 § 51.622 U.S. No. 1 Bright. 51.623 § 51.623 U.S. No. 1 Bronze. 51.624 § 51.624 U.S. Combination. 51.625 § 51.625 U.S. No. 2. 51.626 § 51.626 U.S. No. 2 Russet. 51.627 § 51.627 U.S. No. 3. Previous Definitions Definitions Next Metric Conversion Table Metric Conversion Table