| 252 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS1806 | K7766 | BRITISH STANDARDS INSTITUTION |
| DEFSTAN02-337-252-FC70 | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| NES 337 | K2516 | MINISTRY OF DEFENCE NAVY SHIPS SUPPORT AGENCY |
| BS1806-252 | K7766 | BRITISH STANDARDS INSTITUTION |
| BSM48-252 | K7766 | BRITISH STANDARDS INSTITUTION |
| NES 337-1984 | K2516 | MINISTRY OF DEFENCE NAVY SHIPS SUPPORT AGENCY |
| NES 337-252-FC70 | K2516 | MINISTRY OF DEFENCE NAVY SHIPS SUPPORT AGENCY |
| NES337-252-FC70-(V72G) | L6427 | MOBILE VALVE REPAIRS |
| NES337-252-FC70-(V72G) | U6183 | PRECISION POLYMER ENGINEERING LIMITE |