W 0379, steel 8, galvanised, blue passivated (A2K)
- Easy installation. Lock washer and nut form one unit
- Single piece. Ordering and storage are streamlined
- Quicker and easier installation, especially for overhead work and in places with difficult access
- Large contact surfaces, better distribution of tension
- Better overlap for large through holes and slots
- Protection of workpiece surface. Prevents paint damage and corrosion
