| 991/4/00872/007 | K2523 | EATON LIMITED |
| B0758 | K0207 | HALE HAMILTON (VALVES) LIMITED |
| DEFSTAN53-46 | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| BS1981 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS1981-TABLE 4 1/4 UNF X 3/4 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS1981FCSLUN0.250X012ST00CD | K7766 | BRITISH STANDARDS INSTITUTION |