| 11-028-8255-75 | 81165 | PLYMOUTH RUBBER CO INC |
| 2-028-77-545 | 83259 | PARKER-HANNIFIN CORPORATION |
| 2-028V747-75 | 02697 | PARKER-HANNIFIN CORP |
| 2-028V747-75 | C0308 | PARKER HANNIFIN GMBH O-RING DIVISION |
| 2-028V884-75 | 02697 | PARKER-HANNIFIN CORP |
| 645001RR028 | 99551 | GOODRICH CORPORATION |
| A28SR277-70 | 95272 | STILLMAN SEAL CORPORATION |
| M83248-1-028ES | H2313 | ERIKS B.V. |
| M83248/1-028 | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |
| M832481-028 | 18350 | PALL AEROPOWER CORPORATION |
| MILR2765-028ES | H2313 | ERIKS B.V. |
| MILR83248 | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |
| S9413-028 | 99183 | AIRCRAFT RESEARCH CO |
| S9413-028 | 99193 | HONEYWELL INTERNATIONAL INC. |