| BS4183 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS4183-TABLE 4 M6 X 20 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS4183SMMCPNCR06-0X020S00048C0 | K0851 | MINISTRY OF DEFENCE DIRECTORATE OF STANDARDIZATION STAN 1 |
| BS4183TABLE4M6X20STLCADPL | K7766 | BRITISH STANDARDS INSTITUTION |
| BS4183SMMCPNCR06-0X020S00048C0 | K9090 | MINISTRY OF DEFENCE |