A Lock washer exerts a spring force between the fasteners head and the substrate, which maintains the washer hard against the substrate and the bolt thread hard against the nut or substrate thread, creating more friction and resistance to rotation.
Internal or?External?65Mn Steel?Star?Type Lock Washers.
- Weight: 84g; Package Content: 50(+/-2%) x Starlock Washer
- Main Color: Black; Outer Dia: 25mm/1"
- Thickness: 3mm/1.2"
- Inner Diameter: 12mm/0.47"