| 10AC5130 | U1725 | MINISTRY OF DEFENCE AIR DOMESTIC R FERENCE NUMBER USE ONLY |
| BS2470 | K7766 | BRITISH STANDARDS INSTITUTION |
| PF47671-2 | K0991 | MARCONI COMMUNICATION SYSTEMS LTD |
| BS2470 TABLE 6A-6UNCX0.188 | K7766 | BRITISH STANDARDS INSTITUTION |
| S | U1811 | UNBRAKO A DIVISION OF S P S TECHNOLO IES LTD |
| PF47671-2 | U2248 | SELEX ELSAG LTD |