- YongnianDistrict Handan city, Hebei Province
- Nancy@mj-anchor.com
- +86 18131004569
Our Internal Tooth Star Lock Washers are a specialized type of fastener designed to provide a simple yet highly effective solution for preventing nuts and bolts from loosening under vibration and torque. Characterized by their distinctive star-shaped internal teeth, these washers are placed under the head of a fastener or nut. When tightened, the sharp, twisted teeth bite into both the underside of the fastener head and the mating surface of the component. This dual-action grip creates a powerful mechanical lock and spring-like tension, significantly increasing friction and preventing rotational loosening. They are a cost-effective and reliable choice for securing components in a wide variety of applications.
The locking mechanism of our star washers is both mechanical and tension-based. As the fastener is tightened, the washer is flattened, and the internal teeth flex like springs, exerting a continuous upward force against the fastener head. Simultaneously, the sharp edges of the teeth dig into the softer material of the fastener and the joint surface, creating a strut-like action that resists counter-rotation.
We manufacture these washers from high-quality carbon steel, which is then treated with a black oxide finish to provide good corrosion resistance and a durable, non-reflective surface. For applications in more demanding or corrosive environments, stainless steel options are also available.
The following tables outline the technical and dimensional specifications for our Internal Tooth Star Lock Washers.
General Specifications:
| Parameter | Description |
|---|---|
| Product Name | Star Lock Washer (Internal Tooth Type) |
| Material | Carbon Steel, Stainless Steel (A2-70, A4-70, etc.) |
| Finish | Black Oxide Coating, Plain |
| Size Range | 1/16″ to 1″ (Imperial). Metric sizes (e.g., M3, M5, M8) and custom sizes available. |
| Application | Heavy Industry, General Industry, Electronics, Automotive, Appliances |
| Certificates | ISO9001, ISO14001, ISO45001, SGS |
Dimensional Specifications (Imperial Sizes):
The table below shows a representative sample of available sizes. A full range from 1/16″ to 1″ is available.
| Nominal Diameter (d) | Outer Diameter (dc) | Thickness (s) | Number of Teeth |
|---|---|---|---|
| 1/8″ (3.2 mm) | 9.5 – 9.9 mm | 0.20 mm | 4 |
| 1/4″ (6.4 mm) | 15.1 – 15.5 mm | 0.25 mm | 6 |
| 1/2″ (12.7 mm) | 24.9 – 25.3 mm | 0.40 mm | 6 |
| 3/4″ (19.1 mm) | 36.4 – 36.8 mm | 0.40 mm | 9 |
| 1″ (25.4 mm) | 41.1 – 41.5 mm | 0.50 mm | 9 |
Our Internal Tooth Star Lock Washers are engineered for maximum reliability, offering several key advantages:
Internal Tooth Star Lock Washers are ideal for low-to-medium torque applications where preventing fastener loosening is critical. Common uses include:
