DS EN 3614:2009 Aerospace Series - Bolts, Normal Hexagonal Head, Relieved Shank, Long Thread, In Heat Resisting Steel Fe-Pa2601 (A286), Silver Plated - Classification: 900 Mpa/650 Degree C Defines the characteristics of silver plated bolts normal hexagonal head with relieved shank and long thread in heat resisting steel FE-PA2601 (A286), for aerospace applications.