| BS1981 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS1981-TABLE 14 4 UNC X 3/4 | K7766 | BRITISH STANDARDS INSTITUTION |
| C104955-042405 | K0016 | REDIFON MEL LTD |
| BS1981F1LHDSLT4-40UNC3-41N | U9115 | MINISTRY OF DEFENCE BRITISH STANDARD REFERENCES CONSTRUCTED TO A DEFINITI LEVEL FOR EUROFIGHTER AND TORNADO U NCB TASKING |
| BS1981FILHDSLT4-40UNC3/4IN | U9115 | MINISTRY OF DEFENCE BRITISH STANDARD REFERENCES CONSTRUCTED TO A DEFINITI LEVEL FOR EUROFIGHTER AND TORNADO U NCB TASKING |