Superfast1

Toyota doesn't put in a Schrader valve on our Lexus LS400's fuel line to measure fuel pressure. I want to put in a T- Schrader valve at the fuel line connection right next to the drive side's strut tower. Does anyone know a p/n of one or the size & thread pitch of the fuel line connection? It looks like a 12mm but I'm not sure about the pitch so let me know if you have the info. Thanks