| BS1981 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS1981-NO.4-40UNCX3/8LG-MSCP | U9115 | MINISTRY OF DEFENCE BRITISH STANDARD REFERENCES CONSTRUCTED TO A DEFINITI LEVEL FOR EUROFIGHTER AND TORNADO U NCB TASKING |
| BS1981-TABLE 12 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS1981TAB12SLPANHDUNC4X3/8 | U9115 | MINISTRY OF DEFENCE BRITISH STANDARD REFERENCES CONSTRUCTED TO A DEFINITI LEVEL FOR EUROFIGHTER AND TORNADO U NCB TASKING |