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| BS1981 | K7766 | BRITISH STANDARDS INSTITUTION |
| DEFSTAN53-43 | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| BS1981-TABLE 14 4 UNC X 3/8 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS1981T14:4UNCX3/8S25C | K7766 | BRITISH STANDARDS INSTITUTION |
| FV6039591TEM23 | U0795 | QINETIQ |
| L072-404 | K0233 | THALES OPTRONICS LIMITED |
| Y5335-698 | U0041 | PRESTOLITE ELECTRIC LIMITED TEMS |
| Z5335-698 | U0041 | PRESTOLITE ELECTRIC LIMITED TEMS |