| BS450 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS450-1958TAB2-2 3-16BSWX1-2MS5- | K0195 | BRITISH STANDARDS INSTITUTION |
| NEN1780A-BSW3/16X1/2-CUZN | H1266 | STICHTING NEDERLANDSNORMALISATIE-INSTITUUT |
| BS450-1958TAB2-2-3-16BSWX1-2MS5- | K0195 | BRITISH STANDARDS INSTITUTION |