| BS4439 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS4439-M12X50-4H-1D | K7766 | BRITISH STANDARDS INSTITUTION |
| PL 004501836 | K2516 | MINISTRY OF DEFENCE NAVY SHIPS SUPPORT AGENCY |
| PL 004501836 REFERENCE 1309 | K2516 | MINISTRY OF DEFENCE NAVY SHIPS SUPPORT AGENCY |
| P.L. M.C.M./358/01/001 REFERENC- | K4944 | BAE SYSTEMS SURFACE SHIPS LIMITED |