7 CFR § 810.402 - Definition of other terms.

---
identifier: "/us/cfr/t7/s810.402"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "7 CFR § 810.402 - Definition of other terms."
title_number: 7
title_name: "Agriculture"
section_number: "810.402"
section_name: "Definition of other terms."
chapter_name: "AGRICULTURAL MARKETING SERVICE (FEDERAL GRAIN INSPECTION SERVICE, FAIR TRADE PRACTICES PROGRAM), DEPARTMENT OF AGRICULTURE"
subchapter_number: "A"
subchapter_name: "FEDERAL GRAIN INSPECTION"
part_number: "810"
part_name: "OFFICIAL UNITED STATES STANDARDS FOR GRAIN"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "7 U.S.C. 71-87k."
regulatory_source: "52 FR 24418, June 30, 1987, unless otherwise noted."
cfr_part: "810"
---


# 810.402 Definition of other terms.

(a) *Broken corn.* All matter that passes readily through a 
12/64 round-hole sieve and over a 
6/64 round-hole sieve sample according to procedures prescribed in FGIS instructions.

(b) *Broken corn and foreign material.* All matter that passes readily through a 
12/64 round-hole sieve and all matter other than corn that remains in the sieved after sieving according to procedures prescribed in FGIS instructions.

(c) *Classes.* There are three classes for corn: Yellow corn, White corn, and Mixed corn.

(1) *Yellow corn.* Corn that is yellow-kerneled and contains not more than 5.0 percent of corn of other colors. Yellow kernels of corn with a slight tinge of red are considered yellow corn.

(2) *White corn.* Corn that is white-kerneled and contains not more than 2.0 percent of corn of other colors. White kernels of corn with a slight tinge of light straw or pink color are considered white corn.

(3) *Mixed corn.* Corn that does not meet the color requirements for either of the classes Yellow corn or White corn and includes white-capped Yellow corn.

(d) *Damaged kernels.* Kernels and pieces of corn kernels that are badly ground-damaged, badly weather-damaged, diseased, frost-damaged, germ-damaged, heat-damaged, insect-bored, mold-damaged, sprout-damaged, or otherwise materially damaged.

(e) *Foreign material.* All matter that passes readily through a 
6/64 round-hole sieve and all matter other than corn that remains on top of the 
12/64 round-hole sieve according to procedures prescribed in FGIS instructions.

(f) *Heat-damaged kernels.* Kernels and pieces of corn kernels that are materially discolored and damaged by heat.

(g) *Sieves*—(1) *12/64 round-hole sieve.* A metal sieve 0.032 inch thick with round perforations 0.1875 (12/64) inch in diameter which are 
1/4 inch from center to center. The perforations of each row shall be staggered in relation to the adjacent row.

(2) *6/64 round-hole sieve.* A metal sieve 0.032 inch thick with round perforations 0.0937 (6/64) inch in diameter which are 
5/32 inch from center to center. The perforations of each row shall be staggered in relation to the adjacent row.

[52 FR 24418, June 30, 1987, as amended at 52 FR 24437, June 30, 1987; 52 FR 28534, July 31, 1987]