This European Standard specifies the properties of acrylonitrile-butadiene rubber (NBR) ), fuel and synthetic oil resistant, hardness 50 IRHD, for aerospace applications.
DS/EN 2845:2013 history
2013DS/EN 2845:2013 Aerospace series - Acrylonitrile-butadiene rubber (NBR) - Fuel and synthetic oil resistant - Hardness 50 IRHD