7 CFR 810.604 - Grades and grade requirements for flaxseed.

Grade	Minimum test weight per bushel (pounds)	Maximum limits of damaged kernels—		Heat damaged kernels (percent)	Total (percent)	U.S. No. 1	49.0	0.2	10.0	U.S. No. 2	47.0	0.5	15.0	U.S. Sample grade—				U.S. Sample grade is flaxseed that:				(a) Does not meet the requirements for the grades U.S. Nos. 1 or 2; or				(b) Contains 8 or more stones which have an aggregate weight in excess of 0.2 percent of the sample weight, 2 or more pieces of glass, 3 or more crotalaria seeds (Crotalaria spp.), 2 or more castor beans (Ricinus communis L.), 4 or more particles of an unknown foreign substance(s) or a commonly recognized harmful or toxic substance(s), 10 or more rodent pellets, bird dropping, or equivalent quantity of other animal filth per 1 1/8 to 1 1/4 quarts of flaxseed; or				(c) Has musty, sour, or commercially objectionable foreign odor (except smut or garlic odor), or				(d) Is heating or otherwise of distinctly low quality.