| BS1806-427 | K7766 | BRITISH STANDARDS INSTITUTION |
| BSM48-427 | K7766 | BRITISH STANDARDS INSTITUTION |
| DEFSTAN02-337-427-MN90 | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| NES 337 | K2516 | MINISTRY OF DEFENCE NAVY SHIPS SUPPORT AGENCY |
| NES 337-1984 | K2516 | MINISTRY OF DEFENCE NAVY SHIPS SUPPORT AGENCY |
| NES 337-427-MN90 | K2516 | MINISTRY OF DEFENCE NAVY SHIPS SUPPORT AGENCY |
| NES337-427-MN90-(N93B) | U6183 | PRECISION POLYMER ENGINEERING LIMITE |