These Brass Shut Off valves are designed with 1/8" , 1/4" and 3/8" NPT threads on both ends for various systems.

P/N     5280       3/8"     female both ends
P/N     5281       1/4"     female both ends
P/N     5282       1/8"     female both ends
P/N     5285        3/8"    male to female
P/N     5286       1/4"     male to female
P/N     5287       1/8"     male to female