Are you looking for any specific standard or Manufacturer?
There no such "seperate" content packs for these items.
You can find some in you CPAK folders (in-the-box, content that comes with your installation), also in some content packs like Georgefischer etc.,
thank you for your reply. However we are looking for flange adaptor and mechanical coupling specifically for carbon steel pipe to JIS G 3452. Please inform me if there is surch pack to download.
Did you happen to take a look at the JIS content packs?
If not, please download and have a look from the below link.