| 141 | K7766 | BRITISH STANDARDS INSTITUTION |
| 5330-038206 | U1278 | MINISTRY OF DEFENCE NAVY |
| BO5314 | K0207 | HALE HAMILTON (VALVES) LIMITED |
| BS1806 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS1806-141 | K7766 | BRITISH STANDARDS INSTITUTION |
| BSM48-141 | K7766 | BRITISH STANDARDS INSTITUTION |
| SW233A3 | K0584 | MINISTRY OF DEFENCE NAVY |
| DEFSTAN02-337-141-MN80 | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| NES 337 | K2516 | MINISTRY OF DEFENCE NAVY SHIPS SUPPORT AGENCY |
| NES 337-141-MN80 | K2516 | MINISTRY OF DEFENCE NAVY SHIPS SUPPORT AGENCY |
| NES 337-1984 | K2516 | MINISTRY OF DEFENCE NAVY SHIPS SUPPORT AGENCY |
| NES337-141-MN80-(N83B) | U6183 | PRECISION POLYMER ENGINEERING LIMITE |