DS EN 3431:2008
DS EN 3431:2008 Aerospace Series - Nuts, Hexagonal, Self-Locking, With Counterbore And Captive Washer, In Heat Resisting Steel, Silver Plated - Classification: 1100 Mpa (At Ambient Temperature)/425 Degrees C Defines the characteristics of self-locking hexagonal nuts, with counterbore and captive washer, in heat resisting steel, silver plated.