DS EN 2753:1996 Aerospace Series - Nuts, Anchor, Self-Locking, Fixed, Single Lug, With Counterbore, In Alloy Steel, Cadmium Plated, Mos[2] Lubricated - Classification: 1100 Mpa (At Ambient Temperature)/235 Degrees C Defines the characteristics of self-locking, fixed, single lug anchor nuts, with counterbore, in alloy steel, cadmium plated, MoS[2] lubricated.