| 1624A ITEM 35 | K3762 | FERRANTI NAVAL SYSTEMS DIV OF GEC MARCONI |
| 1624A-D | K3762 | FERRANTI NAVAL SYSTEMS DIV OF GEC MARCONI |
| P153002 | K3762 | FERRANTI NAVAL SYSTEMS DIV OF GEC MARCONI |
| BS1981 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS1981-TABLE 8 10 UNC X 1/4 | K7766 | BRITISH STANDARDS INSTITUTION |