Hexagonal nut with flange and clamping piece (all-metal) according to MBN standard

Surface protection:

In accordance with DBL 9440.40 (silver zinc-flake coating with lubrication integrated in sealing, Cr(VI)-free) > VDA 235-104.42

Corrosion resistance:

• ≤ M8 - approx. 480 h, no base metal corrosion in accordance with DIN EN ISO 9227-NSS


• ≥ M10 - approx. 720 h, no base metal corrosion in accordance with DIN EN ISO 9227-NSS

The specified corrosion resistances apply for the corrosion tests according to DIN EN ISO 9227-NSS (salt spray tests), at the earliest 24 h after coating in the "as coated" state, i.e. before sorting, packaging, transporting and/or assembly. These values can be reduced through inevitable handling and assembly processes.

A transfer of the corrosion resistances from the salt spray test to real assembly and operating conditions is not possible in the majority of cases. When designing a connection both the combined materials and if necessary coatings as well as the environmental conditions during operation must be considered by the designer in the selection of a suitable corrosion protection coating.

Friction coefficient:

μ_tot = 0.09-0.14 (VDA 235-101)