Nitrile Butadiene Rubber (NBR) 55-65 °IRHD. Copolymer of acrylonitrile and butadiene. To meet Aerospace Material Specification DTD5595A Grade 60. Applications: Synthetic rubber resistant to petroleum-based fuels and diester-based lubricants. They are unsuitable for use in contact with phosphate ester hydraulic fluids and have poor ozone resistance. |