View Cart
Stainless 400 Series INTERNAL/EXTERNAL Tooth Lock Washer (Inch)
Our Stainless Steel 400 Series Internal / External Tooth Lock Washers are mechanical locking components designed to resist loosening caused by vibration, shock, and dynamic loading. Manufactured from 400 series stainless steel, these lock washers provide a combination of corrosion resistance and increased hardness compared to 18‑8 stainless, making them well suited for applications requiring stronger bite and locking action.
The tooth lock washer design features sharp, serrated teeth that dig into both the fastener head and the mating surface during installation.
- Internal tooth lock washers have teeth located on the inner diameter and are commonly used where minimal washer visibility or smaller fastener heads are required.
- External tooth lock washers feature teeth on the outside diameter, providing a wider locking surface and stronger resistance to rotation.
Designed for dependable locking performance, 400 Series Stainless Internal and External Tooth Lock Washers are commonly used in electrical assemblies, machinery, motors, equipment enclosures, automotive components, and industrial installations. The biting action of the teeth helps maintain preload and electrical continuity, making these washers particularly effective in grounding and conductive applications. Stainless 400 series material offers improved wear resistance and spring characteristics while maintaining corrosion resistance suitable for many industrial environments. Available in a range of sizes and tooth styles, these lock washers provide a reliable fastening solution for OEM manufacturing, maintenance, and repair operations where vibration resistance is critical.
