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Shear Nuts

When it comes to ensuring the safety and security of valuable assets, using robust fastening solutions is of paramount importance. Shear nuts, also known as breakaway nuts or snap-off nuts, are specifically designed to provide enhanced security by thwarting unauthorised access and tampering. In this blog article, we will delve into the world of shear nuts, exploring their features, applications, and the benefits they offer in various industries.


What are Shear Nuts?

Specialised fasteners, shear nuts, enhance security with their unique design, comprising two main components: a standard nut and a breakaway portion. The breakaway section, affixed to the top of the nut, is engineered to shear off at a predetermined torque level, creating a tamper-resistant installation.


Simple Yet Effective: How they Work

The concept behind shear nuts is simple yet effective. When tightening a shear nut onto a bolt or stud, it stresses the breakaway portion. As the torque reaches a specific threshold, the breakaway portion of the nut fractures, leaving only the threaded nut portion attached to the fastener. The remaining nut is nearly impossible to remove without specialised tools, providing a reliable deterrent against tampering and unauthorised access.


Applications of Shear Nuts

Public Infrastructure: Shear nuts find extensive use in public infrastructure projects, including bridges, railways, road signs, and lighting fixtures. They offer a robust security solution by preventing vandalism, theft, and unauthorised disassembly.

Automotive Industry: The automotive industry commonly uses shear nuts to secure components prone to theft, acting as a deterrent to ensure critical parts remain intact and secure.

Electrical and Electronic Equipment: People use shear nuts to secure valuable electrical and electronic equipment, preventing unauthorised access or the removal of critical components. They prove particularly useful in safeguarding control panels, distribution boxes, and other sensitive installations.

Machinery and Equipment: Industrial machinery and equipment often require strong fasteners to maintain their integrity. Consequently, shear nuts help prevent tampering, ensuring the machinery remains operational and secure.


Exploring the Benefits of Shear Nuts

Enhanced Security: Shear nuts provide an extra layer of security, protecting against theft, vandalism, and unauthorised access. Moreover, their unique design makes it challenging to remove or tamper with the fastener, discouraging potential intruders.

Easy Installation: Installers can use standard tools to install shear nuts, thereby making them convenient for various applications. Additionally, the installation process for shear nuts is similar to traditional nuts, requiring no specialised equipment.

Cost-Effective: Shear nuts provide added security at a cost-effective rate compared to alternative security measures like high-security bolts or tamper-proof screws. They provide reliable protection at a reasonable price point.

Tamper-Indicating Feature: One of the key advantages of shear nuts is their tamper-indicating nature. Once the breakaway portion shears off, one can immediately see that someone has tampered with the fastener. This allows for quick identification of potential security breaches.



In an era where security and asset protection are crucial, shear nuts present an effective and reliable solution. Their unique design, tamper-resistant features, and easy installation make them an ideal choice for various applications across industries. Shear nuts assure the protection of valuable assets from unauthorised access and tampering. They are employed in securing public infrastructure, automotive components, or sensitive equipment. Their cost-effectiveness and proven effectiveness make shear nuts a valuable addition to the toolkit of any security-conscious organisation.


Our team of experts are ready to assist you in choosing the most suitable security screws for your specific requirements.

Contact us today on 1800 776 565.

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