| BS2558-TABLE 6 5.00X5.50MM | K7766 | BRITISH STANDARDS INSTITUTION |
| DEF STAN 51-11 PART 3 | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| DL-9-A | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| H6747 | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| TABLE I(A) 5.00X5.50MM | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| TUBULARB0XSPANNERGRADEA5X5-5MM | U8532 | T.W. ENGINEERING COMPANY LIMITED |