Nylon insert lock nut with flange (all-metal) EN 1664, black zinc-nickel plated 8 steel (ZNBHL)

Fasteners with a zinc plated chromium(VI)-free black zinc-nickel coating (ZNBHL) are suitable for applications with a high risk of corrosion. The coating comprises a zinc-nickel plated alloy layer and a sealing coat (top coat with integrated lubricating particles).

Corrosion resistance:

• Diameter ≥ M2 - 360 h*


• Diameter ≥ M4 - 480 h*


• Diameter ≥ M10 - 720 h*

• *No base metal corrosion in unthreaded areas in salt spray tests in accordance with DIN EN ISO 9227 NSS

Overview of advantages:

• Resistance of up to 720 hours against base metal corrosion in accordance with DIN EN ISO 9227 NSS


• Chromium(VI)-free


• Top coat with integrated lubricating particles adjusts the friction coefficient range to 0.09-0.14 μ


• Thermal resistance up to 120 °C


• Even coating distribution


• Functional and decorative