M8 External Serrated Star Washer SS304 (ID: 8.1mm OD:14.8)

Description

Inner diameter: 8.1mm
Outer diameter: 14.8mm
Thickness: 2.1mm
Material: SS304

External Serrated Star Washer is a locking washer designed to prevent loosening of fasteners under vibration and dynamic loads. Made from SS304 stainless steel, it offers excellent corrosion resistance, durability, and long service life in indoor, outdoor, and humid environments.

The external serrations (teeth) grip into the surface and the fastener head, creating increased friction and a secure hold. This makes it more effective than plain washers in resisting loosening.

What Makes It Different

Unlike flat washers, external serrated washers provide a locking action, ensuring the nut or bolt stays tight even under vibration. The outer teeth also offer a larger contact area, improving grip and stability.

Applications

Commonly used in electrical connections, panels, automotive assemblies, machinery, appliances, and sheet metal fastening, especially where vibration resistance and reliable grounding contact are important.