Eaton Weatherhead 9515X8X8 Carbon Steel Straight Thread O-Ring Adapter, Swivel, 90 Degree Elbow, 1/2" Female Pipe Swivel x 3/4-16 Male Straight Thread O-Ring Adapts 3/4" O-ring male end to 1/2" NPSM female swivel at a 90-degree angle Carbon steel for durability and resistance to rupture under high pressure For use with LP and natural gas, refrigeration, and hydraulic applications