Eaton Weatherhead 9255X4X4 Carbon Steel Fitting, Swivel, Adapter, 1/4" NPSM Female x 1/4" NPTF Female (Pack of 5) Adapts 1/4" NPTF female end to 1/4" NPSM female end Carbon steel for durability and resistance to rupture under high pressure Zinc plated for resistance to corrosion 5,000 psi maximum working pressure