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| BS4518 | K7766 | BRITISH STANDARDS INSTITUTION |
| EM51220 ITEM 119 | K0107 | MACTAGGART, SCOTT & CO. LTD |
| EM51220/119 | K0107 | MACTAGGART, SCOTT & CO. LTD |
| DEFSTAN02-337-2493-57-MN70 | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| BS4518-2493-57 | K7766 | BRITISH STANDARDS INSTITUTION |
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| NES337-2493-57-MN70-(N73B) | U6183 | PRECISION POLYMER ENGINEERING LIMITE |