Industry News

As a leading fastener manufacturer and supplier in China, Tianlong Fastener Company experts share the latest news/technology/price trends/reviews in the fastener industry.

Back to Overview

Hadlock nut factory

2025-04-18

Hardlock Nut is a fastener with high anti-loosening properties to prevent the loosening of threaded connections. Its necessity is mainly reflected in the following aspects:


1. The need to prevent loosening

In mechanical equipment, Bridges, rail transit and other structures, threaded connections are often affected by vibration, shock and other dynamic loads. Loose nuts may cause the following problems:


Potential security risks: Device failure or structural failure may occur if the device is loose, resulting in major security risks.

Reduced reliability: Frequent maintenance or replacement increases cost and time consumption.

Impact on efficiency: Unstable operation of equipment may affect production or operational efficiency.

2. The uniqueness of the Hadlock nut

The Hadlock nut uses a special mechanical design (usually one large nut and two small nuts are used together) to achieve self-locking function through wedge force or interference. Its characteristics are as follows:


High anti-loosening performance: It can remain tight even under strong vibration.

No additional locking parts: No auxiliary materials such as spring washers and locking adhesives are required to simplify the installation process.

Strong reusability: Compared to one-time locking methods (such as gluing), Hadlock nuts can be reused many times.

3. Necessity of application scenario

The Hadlock nut is particularly important in the following scenarios:


High vibration occasions: such as railway tracks, heavy machinery, wind turbines, etc.

High safety requirements: such as aerospace, nuclear power facilities, Bridges and high-rise building structures.

Places that are difficult to maintain: such as offshore platforms, deep-sea equipment, etc., reduce maintenance costs after loosening.

4. Economic and benefit considerations

Although the unit price of the Hadlock nut is slightly higher than that of the ordinary nut, its long-term benefits are significant:


Reduce maintenance frequency: Extend the maintenance period of the connector.

Reduce downtime: Improve the efficiency of equipment operation.

Prolong the life of the equipment: avoid secondary damage caused by loosening.

5. Compare other locking methods

The characteristics and disadvantages of the locking method

Ordinary gasket is simple to use, low cost, limited anti-loosening effect, easy to loose due to vibration

Spring washers provide certain anti-loosening properties that may fail after prolonged use

Threaded locking adhesive fixed performance is better one-time use, not easy to disassemble

Hardlock nuts have high locking properties and can be reused. The initial cost is high and requires proper installation

In summary, the Hadlock nut has an irreplaceable role in the scene of high vibration and high safety requirements, and is a necessary choice to ensure structural stability and reliability.

cb51a4a9a3d09b3.png