| 10AC131 | U1725 | MINISTRY OF DEFENCE AIR DOMESTIC R FERENCE NUMBER USE ONLY |
| BS1806-342 | K7766 | BRITISH STANDARDS INSTITUTION |
| R186 | K0640 | FREUDENBERG TECHNICAL PRODUCTS |
| ERAD25318 | K0991 | MARCONI COMMUNICATION SYSTEMS LTD |
| BSM48-342 | K7766 | BRITISH STANDARDS INSTITUTION |
| ERAD25318 | U2248 | SELEX ELSAG LTD |
| R6362 | K0640 | FREUDENBERG TECHNICAL PRODUCTS |