| BS879TABLE3 6IN ID | K7766 | BRITISH STANDARDS INSTITUTION |
| KN1610 | K0243 | MINISTRY OF DEFENCE ARMY HQ ENGINEER RESOURCES |
| KN1611 | K0243 | MINISTRY OF DEFENCE ARMY HQ ENGINEER RESOURCES |
| KN1612 | K0243 | MINISTRY OF DEFENCE ARMY HQ ENGINEER RESOURCES |
| KN1613 | K0243 | MINISTRY OF DEFENCE ARMY HQ ENGINEER RESOURCES |