DS EN 3009:1998 Aerospace Series - Bolts, Hexagon Head, Relieved Shank, Long Thread, In Heat Resisting Nickel Base Alloy Ni-P100ht (Inconel 718), Silver Plated - Classification: 1275 Mpa (At Ambient Temperature)/650 Degree C Defines the characteristics of hexagon headed bolts with relieved shank and long thread, in NI-P100HT, silver plated, for aerospace applications.