Attributes . Exceptional tensile strength; High levels of durability in severely corrosive environments filled with saltwater, acids or chemicals; Combination tightening surface includes both a hex area and knurled surface on nickel plated aluminum only; Embedded o-ring is standard on stainless steel connectors only; For use in washdown areas or high moisture environments in food processing plants, petrochemical facilities, wastewater treatment plants, pulp and paper mills and chemical manufacturing facilities; 304 stainless steel compression nut, Viton o-ring . Names