| BS4518- REFERENCE 2293-57 | K7766 | BRITISH STANDARDS INSTITUTION |
| REFERENCE 2293-57 | K7766 | BRITISH STANDARDS INSTITUTION |
| RM2293-57 | K0640 | FREUDENBERG TECHNICAL PRODUCTS |
| RM2293-57P5 | K0640 | FREUDENBERG TECHNICAL PRODUCTS |
| RM2293-5700 | K4556 | BRITISH AEROSPACE DEFENCE SYSTEMS LTD T/A BAE SYSTEMS |