DS EN 3729:2008
DS EN 3729:2008 Aerospace Series - Rings, Threaded, Self-Locking, Left-Hand Thread, In Heat Resisting Steel Fe-Pa92ht (A286), Silver Plated Defines the characteristics of threaded, self-locking rings, with left-hand threads, in FE-PA92HT, silver plated, chiefly used for axial location of bearing outer rings.