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| 16B9045 | U1725 | MINISTRY OF DEFENCE AIR DOMESTIC R FERENCE NUMBER USE ONLY |
| 17-27B | 99237 | AIRFORCE-NAVY AERONAUTICAL DESIGN STANDARD |
| 551398 | A0461 | CALZONI S.R.L. |
| BS1806-262 | K7766 | BRITISH STANDARDS INSTITUTION |
| 262 | K7766 | BRITISH STANDARDS INSTITUTION |
| R4700P5 | K0640 | FREUDENBERG TECHNICAL PRODUCTS |
| WE1802-8 | K1750 | WALTON ENGINEERING CO LTD |
| S936-43 | K4394 | FILTON LTD |
| BSM48-262 | K7766 | BRITISH STANDARDS INSTITUTION |