| BS450 | K7766 | BRITISH STANDARDS INSTITUTION |
| BS450-1958TAB4FIG8 3-16BSWX1-2 - | K0195 | BRITISH STANDARDS INSTITUTION |
| NEN1779A-BSW3/16X1/2"-4.6 | H1266 | STICHTING NEDERLANDSNORMALISATIE-INSTITUUT |
| BS450-1958TAB4FIG8-3-16BSWX1-2-- | K0195 | BRITISH STANDARDS INSTITUTION |