| 428 | K7766 | BRITISH STANDARDS INSTITUTION |
| 50-428 | U2164 | JAMES WALKER & CO LTD |
| 87/00298 | K5682 | TRUFLO MARINE LTD |
| BS1806-428 | K7766 | BRITISH STANDARDS INSTITUTION |
| BSM48-428 | K7766 | BRITISH STANDARDS INSTITUTION |
| 50-428 | U8616 | JAMES WALKER & CO LTD |
| DEFSTAN02-337-428-FC90 | 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 337-428-FC90 | K2516 | MINISTRY OF DEFENCE NAVY SHIPS SUPPORT AGENCY |
| NES337-428-FC90 | L6427 | MOBILE VALVE REPAIRS |
| JW50-428 | U2164 | JAMES WALKER & CO LTD |
| NES337-428-FC90 | U6183 | PRECISION POLYMER ENGINEERING LIMITE |
| JW50-428 | U8616 | JAMES WALKER & CO LTD |