The TeeJet Type T Female Inlet Nozzle Body is a great product for industrial or agricultural applications. This nozzle body fits on Male National Pipe Thread (MNPT), and is available in 4 thread sizes: 1/8" (3.2 mm), 1/4" (6.5 mm), 3/8" (9.5 mm), 1/2" (13 mm).
Also available in stainless steel: You must call to place a special order. (1-800-461-1041)
Combine with Teejet Threaded Caps CP1325 Brass, Teejet nozzles, and TeeJet strainers for a complete nozzle assembly.
There is a chart that you may find useful in the Resources section regarding these Female Inlet Nozzle Bodies by TeeJet.