| BS4168 PART 1-M5X50-12.9ZN | K7766 | BRITISH STANDARDS INSTITUTION |
| BS4168:PART 1-M5X50-12.9 ZN | K7766 | BRITISH STANDARDS INSTITUTION |
| ER1701 | K0824 | PEARSON ENGINEERING LIMITED |
| DEFSTAN53-25 | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| BSENISO4762 | K7766 | BRITISH STANDARDS INSTITUTION |
| ES122C1B | U9199 | MINISTRY OF DEFENCE UNITED KINGDOM NATIONAL CODIFICATION BUREAU (UKNCB)TASKING, DETAILS FOR CANCELLED NSN'S(CSC D) |
| ISO4762-M5X50-12.9 | I9008 | INTERNATIONAL ORGANIZATION FOR STANDARDIZATION (ISO) |
| FV 2175670ITEM90 | K0407 | BAE SYSTEMS GLOBAL COMBAT SYSTEMS LIMITED |
| M5X50-12.9 ZINC PLATED | K7766 | BRITISH STANDARDS INSTITUTION |
| FV 2175670ITEM90 | U0795 | QINETIQ |