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Teckentrup Electrical NSK-K Belleville Washer - Steel Zinc Flake
The NSK-K is a specialized electrically conductive locking washer for bolted connections that must maintain electrical potential equalization (earthing or grounding) between coated parts. It ensures both mechanical locking and electrical contact.
The serrations are engineered to cut through non-conductive layers like paint, oxides, or other coatings (up to 100μm thick) on the equipment parts. This ensures a reliable, low-resistance electrical connection, making it ideal for grounding and earthing applications.
Key Features & Benefits
Designed to support electrical conductivity as part of equipotential bonding.
Maintains locking function via spring geometry and integrated locking element because of the defined coefficient of friction ensures reproducible clamping behavior.
Compliant with SN 70093 (for electrical contact washers)
Material & Finish
Base materials: Spring steel (C60), Hardness / strength: 430 HV
Zinc flake coating with corrosion protection 720 h salt spray performance (ISO 9227)
Applications
Electro-mechanical assemblies, coated enclosures, electrical cabinets, machinery requiring grounding, structural parts where both mechanical strength and conductive connection are required.
