This standard BS EN 4399:2008 Aerospace series. Rings, threaded, self-locking, in heat resisting steel FE-PA92HT (A286), silver plated is classified in these ICS categories:
49.030.50 Washers and other locking elements
This standard specifies the characteristics of threaded, self-locking rings, in FE-PA2601, silver plated, metric, chiefly used for axial location of bearing outer rings. Maximum test temperature of the parts: 450 °C. NOTE These parts are designed to be used with 4H6H internal threads.
