| 33/2 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS EN ISO 3650 M33/2 | K7766 | BRITISH STANDARDS INSTITUTION |
| DEFSTAN52-11SSUE2 | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| M33/2 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS4311 | K7766 | BRITISH STANDARDS INSTITUTION |