| 21351-301 | U1605 | HONEYWELL AEROSPACE YEOVIL |
| 83333302 | K3958 | VINTEN AVIONICS SYSTEMS LTD |
| A37 | K7766 | BRITISH STANDARDS INSTITUTION |
| A37-X2 | K7766 | BRITISH STANDARDS INSTITUTION |
| 99-636-2862 | U9199 | MINISTRY OF DEFENCE UNITED KINGDOM NATIONAL CODIFICATION BUREAU (UKNCB)TASKING, DETAILS FOR CANCELLED NSN'S(CSC D) |
| 99-715-6762 | U9199 | MINISTRY OF DEFENCE UNITED KINGDOM NATIONAL CODIFICATION BUREAU (UKNCB)TASKING, DETAILS FOR CANCELLED NSN'S(CSC D) |
| A37X2 | K7766 | BRITISH STANDARDS INSTITUTION |
| X2 | K7766 | BRITISH STANDARDS INSTITUTION |