ThePipingMart Blog Fasteners What is Slotted Spring Pin? Properties, Uses and Application

What is Slotted Spring Pin? Properties, Uses and Application

Slotted Spring Pin

Slotted spring pins are important fasteners mainly used in manufacturing, maintenance, and repair applications. These pins are designed to absorb shock and vibration, reducing equipment failure risk and extending lifespan. A good understanding of slotted spring pins is essential whether you are involved in product design, engineering, or maintenance. In this blog, we will explore the properties, uses, and applications of slotted spring pins, helping you gain insights on how to use them effectively.

What is Slotted Spring Pin?

Slotted Spring Pin is a self-locking pin with one or more slots cut along its length, commonly used as a secure connector in many mechanical applications. It’s made from carbon steel and has a cylindrical body with two radiused ends, allowing for greater flexibility and easier assembly. The slots make the pin expand under pressure, making it much more resistant to vibration than standard pins.

Slotted Spring Pins Properties: 

Slotted spring pins are made using high-quality materials such as high-carbon steel, stainless steel, and titanium. The pins are manufactured to strict tolerances, ensuring that they are of high precision and quality. The pins have a unique construction involving a slot running lengthwise throughout their body. The slot helps the pin compress, grip and deform, thereby allowing the pin to easily fit into various diameter holes. Slotted spring pins come in many sizes and diameters, making selecting the right size for your application easy.

Slotted Spring Pins Uses:

Slotted spring pins are popular due to their versatility, application-dedicated design, and properties. They are used in various applications, such as automotive parts, aerospace equipment, computer hardware, and medical devices. They offer unique advantages over other pins and fasteners, such as ease of installation, quick disassembly, and high shear strength. Slotted spring pins can be used as pivot, hinge, and alignment pins. Their compact design makes them ideal for applications where space is limited.

Slotted Spring Pins Applications:

Slotted spring pins are applied in a wide range of industries such as aerospace, automotive, construction, electronics, and marine. The pins are critical in keeping high-performance equipment functioning optimally and safely. For example, in the automotive industry, slotted spring pins are used in engine mechanisms that provide efficient torque transfer and deflection control of system components. In the aerospace industry, the pins are applied to act as shear pins, alignment pins, hinge and pivot pins, and fasten joints holding complex assemblies.

How to Use Slotted Spring Pins:

Slotted spring pins are easy to use, but certain factors must be considered to achieve success. The first step is selecting the right size and material for the spring pin based on the application requirements. The second step is ensuring that the hole diameter is 0.0005 inches larger than the pin for efficient installation. Lubricate the pins before installation using light oil to reduce friction and ensure smooth installation. Lastly, insert the pin into the hole using a proper insertion tool, such as a plier or a punch.


In conclusion, slotted spring pins are essential fasteners that offer unique advantages and functionality compared to other types of pins and fasteners. Their properties, uses, and applications are diverse and cut across different industries. Understanding how to use slotted spring pins is critical in achieving equipment safety, efficiency, and longevity. We hope this blog has provided you with a better understanding of the importance of slotted spring pins and how to select and install them effectively.

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