| BS1768 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS1768-3/8INDIAUNC1 1/4INLGSS | K7766 | BRITISH STANDARDS INSTITUTION |
| BS1768-TABLE 1 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS1768FIG23-8UNCX1-25INLG | U9115 | MINISTRY OF DEFENCE BRITISH STANDARD REFERENCES CONSTRUCTED TO A DEFINITI LEVEL FOR EUROFIGHTER AND TORNADO U NCB TASKING |
| BS1768-3/8INDIAUNC1 1/4INLGSS | U9115 | MINISTRY OF DEFENCE BRITISH STANDARD REFERENCES CONSTRUCTED TO A DEFINITI LEVEL FOR EUROFIGHTER AND TORNADO U NCB TASKING |