DS EN 3687:2011 Aerospace Series - Bolts, Normal Hexagon Head, Relieved Shank, Long Thread, In Heat Resisting Steel Fe-Pa92ht (A286), Silver Plated - Classification: 1100 Mpa/650 Degree C Defines the characteristics of silver-plated Bolts normal Hexagon Head with relieved shank and long thread, in heat resisting steel FE-PA92HT (A286), tensile strength class 1100 MPa at room temperatur