| 31504 | 79911 | OHIO BRASS CO |
| 31504JB | 79911 | OHIO BRASS CO |
| 31504PTJB | 79911 | OHIO BRASS CO |
| 504 | 24446 | GENERAL ELECTRIC COMPANY |
| 504 | 74178 | PROCELAIN PRODUCTS CO |
| 504 | 74368 | DELTA-STAR ELECTRIC DIVISION THOMAS WORKS OF PORTER H K CO OF DELAWARE |
| 504 | 75638 | NGK-LOCKE INC. |
| C29-4CLASS54-2 | 80204 | AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED |
| HH-I-435 | 81348 | FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC |
| L504-BROWN | 74999 | JOSLYN CORP |
| MIL-I-790 | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |
| NG3A1 | 04108 | COOPER INDUSTRIES INC MCGRAW-EDISON POWER SYSTEMS DIV |