| 10AC5116 | U1725 | MINISTRY OF DEFENCE AIR DOMESTIC R FERENCE NUMBER USE ONLY |
| 8PF47421-408 | K0666 | E.C. HOPKINS LIMTED |
| BS1981 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS1981-TABLE 16 4 UNC X 1/4 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS1981TABLE16 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS1981TABLE16-4-40UNCX1-4 | U9115 | MINISTRY OF DEFENCE BRITISH STANDARD REFERENCES CONSTRUCTED TO A DEFINITI LEVEL FOR EUROFIGHTER AND TORNADO U NCB TASKING |
| XS2081 | K0668 | LEONARDO UK LTD |