+26 Double Coil Spring Washer

3/16 DOUBLE COIL SPRING WASHER S/COL Hawk Fasteners from www.hawk-fasteners.co.uk


Welcome to our blog article on double coil spring washers. In this article, we will explore the features, benefits, and applications of double coil spring washers. Whether you are a DIY enthusiast or a professional in the field, this article will provide you with valuable insights into this versatile and essential component.

What is a Double Coil Spring Washer?

Firstly, let's start by understanding what a double coil spring washer is. A double coil spring washer, also known as a Belleville washer, is a type of spring washer designed to provide a high level of spring force and load-bearing capacity. It consists of two coils, one inside the other, which allows for increased spring action and resilience.

Construction and Design

The double coil spring washer is typically made from high-quality stainless steel or other durable materials. Its construction involves precision engineering to ensure optimal performance and longevity. The two coils are designed to interlock, creating a compact and efficient spring mechanism.

Functionality and Working Principle

The primary function of a double coil spring washer is to provide a controlled amount of tension and vibration resistance in various applications. When compressed, the double coil spring washer exerts a force that helps to maintain the integrity of the assembly, preventing loosening and reducing the effects of vibration.

Features and Benefits

Dual Coil Design

The double coil design of this washer offers several advantages over traditional single coil washers. The dual coils provide increased spring action, allowing for greater load-bearing capacity and improved resistance to fatigue. This makes double coil spring washers ideal for applications where high loads and vibrations are a concern.

Excellent Spring Force

Double coil spring washers are known for their exceptional spring force. The double coil design enables them to generate higher levels of tension compared to other types of washers. This makes them particularly suitable for applications requiring strong clamping force or where the joint is subjected to frequent movement or vibrations.

Reliable Performance

Thanks to their robust construction and high-quality materials, double coil spring washers offer reliable and consistent performance. They can withstand heavy loads, extreme temperatures, and corrosive environments, making them suitable for a wide range of industrial and commercial applications.

Reduces the Risk of Loosening

One of the key benefits of using a double coil spring washer is its ability to prevent loosening of fasteners. The spring force exerted by the washer helps to maintain a tight and secure connection, even in high-vibration environments. This reduces the need for frequent maintenance and ensures the integrity of the assembly.

No Backlash

Unlike other types of washers, double coil spring washers have minimal or no backlash. This means that they provide a consistent and even distribution of tension, minimizing the risk of uneven stress on the components. This is particularly important in applications where the joint must withstand dynamic loads or repetitive motion.


Automotive Industry

Double coil spring washers find extensive use in the automotive industry, where they are employed in various components such as engines, suspension systems, and braking systems. Their ability to withstand high loads and vibrations makes them essential for ensuring the safety and reliability of automotive assemblies.

Construction and Engineering

In construction and engineering applications, double coil spring washers are used in structural connections, machinery, and equipment. They provide a reliable and cost-effective solution for securing bolts, reducing the risk of loosening and enhancing the overall stability and performance of the structures.

Industrial Machinery

Industrial machinery often operates in demanding conditions, with high levels of vibration and stress. Double coil spring washers are used in such machinery to prevent loosening of fasteners and maintain the integrity of critical joints. Their ability to withstand heavy loads and extreme environments makes them indispensable in this field.

Electronics and Electrical Equipment

In the electronics and electrical equipment industry, double coil spring washers are utilized in applications such as circuit boards, connectors, and switchgear. Their compact size and excellent spring force make them ideal for ensuring reliable electrical connections and preventing damage caused by vibrations or thermal expansion.

Plumbing and Pipework

Double coil spring washers are commonly used in plumbing and pipework systems, providing a secure connection between pipes and fittings. Their ability to resist the effects of pressure fluctuations and vibrations helps to prevent leaks and maintain the integrity of the system, ensuring efficient and reliable water or fluid flow.

Installation and Maintenance

Proper Selection

When selecting a double coil spring washer, it is important to consider the specific requirements of your application. Factors such as load capacity, temperature range, and corrosion resistance should be taken into account to ensure optimal performance and longevity.

Correct Installation

During installation, it is crucial to follow the manufacturer's guidelines and recommendations. The double coil spring washer should be placed between the fastener and the surface being clamped. The washer should be oriented with the convex side facing the nut or bolt head to ensure proper function.

Regular Inspection

To maintain the effectiveness of double coil spring washers, regular inspection is necessary. Check for signs of wear, corrosion, or deformation that may affect their performance. If any issues are detected, replace the washer immediately to avoid compromising the integrity of the assembly.

Proper Maintenance

In addition to regular inspections, proper maintenance practices should be followed to ensure the longevity of double coil spring washers. This includes keeping the washers clean and free from dirt, debris, or contaminants that may interfere with their function. Lubrication may also be necessary in certain applications to reduce friction and enhance performance.


Double coil spring washers are essential components in various industries and applications. Their unique design and exceptional performance make them a reliable choice for securing fasteners, preventing loosening, and reducing the effects of vibration. By understanding their features, benefits, and proper usage, you can make informed decisions to enhance the reliability and longevity of your assemblies.