2012EN ISO 10513:2012 Prevailing torque type all-metal hexagon high nuts with metric fine pitch thread - Property classes 8, 10 and 12
1997EN ISO 10513:1997 Prevailing Torque Type All-Metal Hexagon Nut, Style 2, with Metric Fine Pitch Thread - Property Classes 8, 10 and 12 ISO 10513:1997