| 230 | K7766 | BRITISH STANDARDS INSTITUTION |
| B03223 | K0207 | HALE HAMILTON (VALVES) LIMITED |
| DEFSTAN02-337-230-MN70 | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| BS1806 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS1806-230 | K7766 | BRITISH STANDARDS INSTITUTION |
| BSM48-230 | K7766 | BRITISH STANDARDS INSTITUTION |
| NES 337 | K2516 | MINISTRY OF DEFENCE NAVY SHIPS SUPPORT AGENCY |
| NES 337-1984 | K2516 | MINISTRY OF DEFENCE NAVY SHIPS SUPPORT AGENCY |
| NES 337-230-MN70 | K2516 | MINISTRY OF DEFENCE NAVY SHIPS SUPPORT AGENCY |
| NES337-230-MN70-(N73B) | U6183 | PRECISION POLYMER ENGINEERING LIMITE |