Eaton Weatherhead 9205X4X4 Carbon Steel Fitting, Swivel, Adapter, 1/4" NPSM Female x 1/4" NPT Male (Pack of 5) Adapts 1/4" NPT male end to 1/4" NPSM female swivel Carbon steel for durability and resistance to rupture under high pressure For use with LP and natural gas, refrigeration, and hydraulic applications