| BS1768 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS1768-TABLE 1 1/2 UNF X 13/16 | K7766 | BRITISH STANDARDS INSTITUTION |
| M/601/20/1/50 | K6451 | BAE SYSTEMS MARINE LIMITED |
| M/601/80/1/9 | K6451 | BAE SYSTEMS MARINE LIMITED |
| SSN07/M/601/20/1/50 | K6451 | BAE SYSTEMS MARINE LIMITED |
| SSN07/M/601/80/1/9 | K6451 | BAE SYSTEMS MARINE LIMITED |