Are you asking about a BSPP (G1/4, G1/8) thread?
yes Bob! we are looking for BSPP and BSPT internal and external threads. Please help us out!
For internal threads, open the Hole Wizard and select "Tapered Tap" (bottom middle) under Hole Type.
For external threads, use Insert/Annotation/Cosmetic Thread.
Sometimes you need too look outside Solidworks for your information.
In this case when I needed BSPP & BSPT port and thread information I looked for the tooling that the machinist would use or the fitting manufacturer in this case Parker.
Look at page T36 in the GENERAL_TECHNICAL PDF for BSPP port information.
For BSPT tap drill size do a Google search.
I made a SLDLFP file for the BSPP ports (see Solidworks help on how to make those files) they save a lot of time if you have many ports in your manifold.
I hope this helps.