DS EN 4084:2009 Aerospace Series - Nuts, Anchor, Self-Locking, Fixed, Two Lug, With Counterbore, In Alloy Steel, Cadmium Plated, Mos[2] Lubricated - Classification: 1100 Mpa (At Ambient Temperature)/235 Degrees C Defines the characteristics of two lug fixed anchor nuts, with counterbore and a self-locking feature achieved by forming the upper portion out-of-round, in alloy steel, cadmium plated, MoS[2] lubrica