| 30A3373 | U1725 | MINISTRY OF DEFENCE AIR DOMESTIC R FERENCE NUMBER USE ONLY |
| DTD5016 | K0249 | MINISTRY OF DEFENCE PROCUREMENT EXECUTIVE |
| DTD5016 3-81NX20SWG | K0249 | MINISTRY OF DEFENCE PROCUREMENT EXECUTIVE |
| T72-3/8INX20SWGX9FTLGMIN | K7766 | BRITISH STANDARDS INSTITUTION |
| T72-T73 | K7766 | BRITISH STANDARDS INSTITUTION |
| T72-T73-3/8IN.X20SWGX9FTLGMIN | K7766 | BRITISH STANDARDS INSTITUTION |