This standard BS EN 3697:2013 Aerospace series. Acrylonitrile-butadiene rubber (NBR). Low temperature resistant. Hardness 60 IRHD is classified in these ICS categories:
49.025.40 Rubber and plastics
This European Standard specifies the properties of acrylonitrile-butadiene rubber (NBR) ), low temperature resistant, hardness 60 IRHD, for aerospace applications.