toilet fill value plastic nut size

Hi all, I need to get a box spanner for the plastic back nut used to fix a new fill valve in. Half inch thread. These all seem to have the same size plastic back nut, but I forgot to bring in the but into work. Does anyone know what size box spanner is required ?
Thanks, Simon.
Add pictures here
✖
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Site Timeline

Related Threads

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.