China Internal Teeth Lock Washer Manufacturer, Supplier, Factory

When precision fastening and vibration resistance are critical, professionals turn to internal teeth lock washers. Also known as an internal serrated lock washer, this component is engineered to prevent nuts and bolts from loosening under dynamic loads. For applications requiring a different locking mechanism, Light Type Single Coil Spring Lock Washers offer an alternative spring-action solution. The reliability of Internal Teeth Lock Washers makes them a staple in industries from automotive to heavy machinery, ensuring long-term joint integrity where safety is paramount.


The <产品名字> is meticulously designed to bite into both the bearing surface and the nut or bolt head. This dual biting action creates a powerful locking force that resists rotational loosening caused by vibration, thermal cycling, and shock loads. The internal teeth are precisely angled and hardened to provide maximum grip without damaging the fastened materials, making them suitable for a wide range of assembly applications.

Key Product Parameters

  • Material: High-Carbon Steel, Stainless Steel (A2/A4), Spring Steel.
  • Finish: Zinc Plated, Plain, Black Oxide, Galvanized.
  • Hardness: HRC 40-50 (Carbon Steel).
  • Teeth Configuration: Internal, radially oriented.
  • Standards: Compliant with DIN 6797, ANSI B18.21.1.

Detailed Size Chart

Nominal Size (M) Inside Diameter (mm) Outside Diameter (mm) Thickness (mm) Number of Teeth
M4 4.5 9.0 1.0 8
M6 6.6 12.0 1.6 10
M8 9.0 16.0 2.0 12
M10 11.0 20.0 2.5 14
M12 13.5 24.0 3.0 16

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