| 0821FWT1657A | U1278 | MINISTRY OF DEFENCE NAVY |
| 1657A | U4378 | TRINITY HATHAWAY LTD |
| 17-27B | 99237 | AIRFORCE-NAVY AERONAUTICAL DESIGN STANDARD |
| BS1806-222/P90 | K0648 | MOOG WOLVERHAMPTON LIMITED |
| BS1806-222 | K7766 | BRITISH STANDARDS INSTITUTION |
| 53Y5927 | U1725 | MINISTRY OF DEFENCE AIR DOMESTIC R FERENCE NUMBER USE ONLY |
| BSM48-222 | K7766 | BRITISH STANDARDS INSTITUTION |