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| BO1830 | K0207 | HALE HAMILTON (VALVES) LIMITED |
| DEFSTAN02-337-019-MN80 | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| BS1806 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS1806-019 | K7766 | BRITISH STANDARDS INSTITUTION |
| BSM48-019 | K7766 | BRITISH STANDARDS INSTITUTION |
| NES 337 | K2516 | MINISTRY OF DEFENCE NAVY SHIPS SUPPORT AGENCY |
| NES 337-019-MN80 | K2516 | MINISTRY OF DEFENCE NAVY SHIPS SUPPORT AGENCY |
| NES 337-1984 | K2516 | MINISTRY OF DEFENCE NAVY SHIPS SUPPORT AGENCY |
| T23S000620 | KC6K3 | LEAFIELD LOGISTICS & TECHNICAL SERVICES LIMITED |
| NES337-019-MN80-(N83B) | U6183 | PRECISION POLYMER ENGINEERING LIMITE |