Material Composition: Fittings from forged or cast pressure resistant carbon steel with a zinc-trivalent anti-corrosion coating. 6409 ORB steel adapters correspond to the following: Parker HP50N, Weatherhead 7238, SAE 090109B, Parker 05HP, Aeroquip FF2138, Tmk 6408-HHP. JIC SAE 37° and SAE ORB (O-Ring Boss) conform to SAE J514 technical specifications. SAE O-Ring Boss ORB Hex Socket Plug. 6409 ORB steel adapters correspond to the following: Parker HP50N, Weatherhead 7238, SAE 090109B, Parker 05HP, Aeroquip FF2138, Tmk 6408-HHP. Material Composition: Fittings from forged or cast pressure resistant carbon steel with a zinc-trivalent anti-corrosion coating. JIC SAE 37° and SAE ORB (O-Ring Boss) conform to SAE J514 technical specifications.