BS EN 2566:2019 pdf free.Aerospace series - Fluorocarbon rubber (FKM) - Hardness 70 IRHD. BS EN 2566 1 Scope This document specifies the properties of fluorocarbon rubber (FKM)1), hardness 70 IRHD, for aerospace applications. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of...