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| 27KF2164 | U1725 | MINISTRY OF DEFENCE AIR DOMESTIC R FERENCE NUMBER USE ONLY |
| BS1806-012 | K7766 | BRITISH STANDARDS INSTITUTION |
| BSM48-012 | K7766 | BRITISH STANDARDS INSTITUTION |
| GD1801-7AM78 | U1068 | TRELLEBORG SEALING SOLUTIONS (UK)LTD |
| CDY431-7H74 | U4330 | HALLITE SEALS INTERNATIONAL LTD T/A I POLYTEK |
| HDS122-1-7 | K0659 | CLAVERHAM LTD |
| P560611-7R1543 | U7680 | STERLING MECHANICAL SEALS LTD |