... Seal,Rubber Seal,Rubber Gasket, O-Ring :Black, red, yellow, brown, white, green, violet etc, can ... Ring, Sealing Gasket.9. Manufacture Process : Heading/washer assembly/Threading/Secondary machine/heat treatment/plating/Anti- ... telfon flat washer specification: metal materialnonmetal materialspecification rangeapplication pressureworking temperatureCu,Mo,Nipure teflonreinforced teflonglass fiber,etc.8 ...