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Keystone inserts are a type of thread insert or thread-forming screw designed for installation in pre-tapped or formed holes. They are useful for adding strength to threads, improving thread wear, and eliminating thread stripping. When properly installed, Keystones are renowned for their strength and reliability.

Thread Insert Application Fields

The application fields of Keystone thread inserts are diverse. They are often used in the automotive industry, both in OEM and aftermarket products. They are also used in production equipment and factory robotics, electronic components, medical devices and laboratory equipment, and a wide variety of consumer products and applications. Thread inserts are also used to repair worn or damaged threads or upgrade existing threads. These stronger and more reliable threads are essential for heavily loaded fixtures, components, and assemblies.

Advantages of Keystone Thread Inserts

When properly installed, Keystone thread inserts provide superior strength and reliability versus traditional tapped threads. They improve the strength and performance of molded-in plastic threads or threads cut into aluminum or magnesium components. Thread inserts are easily installed using inexpensive and widely available installation tools to ensure even distribution of the locking element. This ensures increased thread performance, prevents thread stripping, and extends thread life. Inserts can also be used to replace inferior threads easily and quickly, without the need to re-machine them.

Working Principle of Keystone Inserts

Keystone inserts are threaded inserts that are designed to be installed into pre-tapped or formed holes. The installation process requires the use of a thread-locking element, typically a torque-controlled breakpoint flange-style of insert. As the insert is driven into place, the torque-controlled breakpoint flange compresses, extending the threads into the host material, resulting in a tight and secure fit. The breakpoint flange also creates a shoulder in the material, preventing the insert from turning once it is fully seated.

Types of Keystone Inserts

Keystone thread inserts are available in a variety of styles and configurations, including:

• Molded-in or tapped insert, which uses an internal tapered thread to wedge the material into the predrilled hole;
• Compression-style insert, which uses a thread-locking element to provide a secure and reliable fit;
• Plastic thread insert, which is comprised of a plastic body with an integral thread-locking element;
• Self-locking insert, which utilizes a cylindrical locking element to provide superior thread locking performance;
• High-temperature resistant thread insert, which is designed to withstand extreme temperature fluctuations.

Conclusion

Keystone inserts are a type of thread insert or thread-forming screw designed for installation in pre-tapped or formed holes. They are powerful components that are used to improve the strength and performance of molded-in plastic threads or threads cut into aluminum or magnesium components. They are widely used in a variety of industries, including automotive, production equipment, consumer products, and medical devices. When properly installed, they provide superior strength and reliability versus traditional tapped threads. Different types of thread inserts, such as molded-in, compression-style, plastic, and self-locking are available to meet various application requirements.