7 CFR § 51.2710 - U.S. No. 1 Runner.
“U.S. No. 1 Runner” consists of shelled Runner type peanut kernels of similar varietal characteristics which are whole and free from foreign material, damage and minor defects, and which will not pass through a screen having 16/64 × 3/4 inch openings.
(a) In order to allow for variations incident to proper grading and handling, the following tolerances, by weight, shall be permitted:
(1) 1 percent for other varieties of peanuts;
(2) 3 percent for sound peanuts which are split or broken;
(3) 1.5 percent for damaged or unshelled peanuts;
(4) 0.5 percent for minor defects: Provided, That in addition, any unused part of the tolerance for damaged or unshelled peanuts shall be allowed for minor defects;
(5) 0.1 percent for foreign material; and,
(6) 3 percent for sound whole peanuts which will pass through the prescribed screen.