C.F.R.
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Title 7
» CHAPTER I—AGRICULTURAL MARKETING SERVICE (STANDARDS, INSPECTIONS, MARKETING PRACTICES), DEPARTMENT OF AGRICULTURE › SUBCHAPTER C—REQUIREMENTS AND STANDARDS UNDER THE AGRICULTURAL MARKETING ACT OF 1946 AND THE EGG PRODUCTS INSPECTION ACT › PART 51—FRESH FRUITS, VEGETABLES, AND OTHER PRODUCTS (INSPECTION, CERTIFICATION, AND STANDARDS) › Subpart W—United States Standards for Grades of Shelled Almonds
Foreign material means pieces of shell, hulls or other foreign matter which will not pass through a round opening
8/64 of an inch (3.2 mm) in diameter.