| BS4168 PART 1-M20X55-12.9 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS4168:PART 1 | K7766 | BRITISH STANDARDS INSTITUTION |
| FV 2186011 ITEM 11 | K0407 | BAE SYSTEMS GLOBAL COMBAT SYSTEMS LIMITED |
| FV 2186011/11 | K0407 | BAE SYSTEMS GLOBAL COMBAT SYSTEMS LIMITED |
| FV856600-6 | K0973 | MINISTRY OF DEFENCE PROCUREMENT EXECUTIVE |
| BSENISO4762 | K7766 | BRITISH STANDARDS INSTITUTION |
| ISO4762-M20X55-12.9 | I9008 | INTERNATIONAL ORGANIZATION FOR STANDARDIZATION (ISO) |
| SU71 M20055 | K0407 | BAE SYSTEMS GLOBAL COMBAT SYSTEMS LIMITED |