7 CFR § 51.2730 - U.S. No. 1 Spanish.
“U.S. No. 1 Spanish” consists of shelled Spanish type peanut kernels which are whole and free from foreign material, damage and minor defects, and which will not pass through a screen having 15/64 × 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 types of peanuts;
(5) 0.1 percent for foreign material; and,
(6) 2 percent for sound whole peanuts which will pass through the prescribed screen.