| A-A-997 | 58536 | FEDERAL COMMERCIAL ITEM DESCRIPTION PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC |
| A121 | 81346 | AMERICAN SOCIETY FOR TESTING AND MATERIALS |
| RRF221 | 61497 | UNITED STATES STEEL CORPORATION |
| RRF221 | 80775 | C F AND I STEEL CORP SALES DEPT |
| RR-F-221 | 81348 | FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC |
| RR-F-221/1 | 81348 | FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC |
| RRF221 | 86668 | NORTHWESTERN STEEL AND WIRE CO |
| RRF221 | 89029 | ARMCO INC KANSAS CITY WORKS |