| 17-27B | 99237 | AIRFORCE-NAVY AERONAUTICAL DESIGN STANDARD |
| 5UD8887 | U1725 | MINISTRY OF DEFENCE AIR DOMESTIC R FERENCE NUMBER USE ONLY |
| NK9720 | K4358 | SAFRAN ELECTRICAL & POWER UK LTD |
| BS1806-242 | K7766 | BRITISH STANDARDS INSTITUTION |
| BSM48-242 | K7766 | BRITISH STANDARDS INSTITUTION |