Material Composition: Fittings from forged or cast pressure resistant carbon steel with a zinc-trivalent anti-corrosion coating. 6503 JIC fitting interchange to the following manufacturers: Parker Hydraulics 3703, Weatherhead C5356, SAE 070321, Parker V6X, Aeroquip 2270. JIC SAE 37° and SAE ORB (O-Ring Boss) conform to SAE J514 technical specifications. 37° JIC Male x 37° JIC Female Swivel 45 ° Elbow. 6502 JIC fitting interchange to the following manufacturers: Parker Hydraulics 3703, Weatherhead C5356, SAE 070321, Parker V6X, Aeroquip 2270. 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.