| 28S2649 | U1725 | MINISTRY OF DEFENCE AIR DOMESTIC R FERENCE NUMBER USE ONLY |
| ART1CLE81-79 | K2158 | EUROPEAN INDUSTRIAL SERVICES LTD T/A NETTLEFOLDS |
| DEFSTAN53-33 | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| SP129 | K7766 | BRITISH STANDARDS INSTITUTION |
| SP129-C4 | K7766 | BRITISH STANDARDS INSTITUTION |
| C4 | K7766 | BRITISH STANDARDS INSTITUTION |
| SP129C4 | K7766 | BRITISH STANDARDS INSTITUTION |