This European standard specifies the characteristics of self-locking@ fuel resistant@ sealing@ floating@ two lug anchor nuts@ with counterbore@ in alloy steel@ cadmium plated@ MoS2 lubricated. Classification: 900 MPa1)/120 ??). 1) Corresponds to the minimum tensile stress which the nut is able to withstand at ambient temperature without breaking or cracking when tested with a bolt of a higher strength class. 2) Maximum temperature that the nut is able to withstand@ without permanent alteration to its original characteristics@ after ambient temperature has been restored. The maximum temperature is conditioned by the sealing material.