DS EN 3636:2008 Aerospace Series - Screws, Reduced Pan Head, Offset Cruciform Recess, Relieved Shank, Long Thread, In Heat Resisting Steel Fe-Pa92ht (A286), Silver Plated - Classification: 900 Mpa/650 Degree C Defines the requirements for offset cruciform recess pan head screws with relieved shank and long thread in heat resisting steel FE-PA92HT, silver plated, tensile strength class 900 MPa at room temper