Parker s compression fittings are offered in both extrusions and forgings, manufactured from high quality CA 360, CA 345 and CA 377 brass material. Parker s compression fittings are precision machined to meet SAE J-512 standards and are U.L. listed fie flammable liquids. All brass construction. Economical. Long Nut for vibration. Extrusions Forgings. Meets SAE J-512. Acetal sleeve for use with thermoplastic tubing.