| 1B439 | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| 200-439-0105 | U1068 | TRELLEBORG SEALING SOLUTIONS (UK)LTD |
| BS439 | K0013 | HALL AND HALL LTD |
| BS1806-439 | K7766 | BRITISH STANDARDS INSTITUTION |
| BSM48-439 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS439 | U4330 | HALLITE SEALS INTERNATIONAL LTD T/A I POLYTEK |
| SSML7-17 | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| SSML7-17-1B439 | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| PE6500 | U0848 | PIONEER WESTON |