These Grade 8.8 high-strength black spring lock washers are professional industrial fasteners made from durable carbon steel with blackened surface treatment.
Available in sizes M3, M4, M5, M6, M8, M10, they provide reliable anti-loosening performance for mechanical assembly, equipment maintenance, machinery repair, and industrial fastening applications.
The open spring design effectively prevents screws and bolts from loosening under vibration, ensuring long-term stability and safety.
Blackened surface enhances wear resistance and durability, suitable for heavy-duty and long-term use in industrial environments.
Precision manufacturing ensures consistent size and reliable elasticity, easy to install with standard bolts and screws.
Ideal for mechanical equipment, automotive applications, industrial machinery, furniture assembly, and various heavy-duty fastening projects.
