Mold-In Threaded Inserts are available in thru-thread, blind & locking threads.
Molded-in inserts are installed during the molding operation. The insert is placed on a core pin and plastic is shot around the insert during the molding cycle.

Threaded metal inserts allow for assembly and disassembly of the plastic component without degrading the plastic

Links to the Manufacturer's Website provides CAD Downloads & Dimensional Data for Each Design Style