High pressure carbon steel with zinc trivalent anti-corrosion coating. SAE 37° JIC meets SAE J514 specifications and are used for petroleum and mineral oil based fluids in hydraulic Use with 318 tube nut. 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 37° JIC Tube Sleeve 319 JIC fitting interchange to the following manufacturers: * SAE 070115 * Weatherhead C5165 * Aeroquip 900605 * Parker TX * Parker Hydraulics 06S Use with 318 tube nut