Eaton Weatherhead 9315X10X8 Carbon Steel Straight Thread O-Ring Adapter, Swivel, Adapter, 1/2" Female Pipe Swivel x 7/8" Male Straight Thread O-Ring Adapts 7/8" NPTF male end with O-ring to 1/2" NPSM female end Carbon steel for durability and resistance to rupture under high pressure Zinc plated for resistance to corrosion 3,000 psi maximum working pressure