| 17-27B | 99237 | AIRFORCE-NAVY AERONAUTICAL DESIGN STANDARD |
| BS1806-230 | K7766 | BRITISH STANDARDS INSTITUTION |
| R4250 | K0640 | FREUDENBERG TECHNICAL PRODUCTS |
| R425D | K0640 | FREUDENBERG TECHNICAL PRODUCTS |
| PH64601-230 | K2059 | MARCONI BROOMFIELD LTD |
| BSM48-230 | K7766 | BRITISH STANDARDS INSTITUTION |