what is a hi lok fastener

What is a Hi-Lok Fastener and How Does it Work?

A Hi-Lok fastener is a type of reinforced bolt that is used in a wide range of applications in the aviation and aerospace industries. It is prized for its ability to provide the necessary connections that are able to keep aircraft and aerospace structures secure and in place. This article will explore what exactly a Hi-Lok fastener is, how it works, and some of the common applications in which they are used.

What is a Hi-Lok Fastener?

A Hi-Lok fastener is a type of threaded fastener that resembles a regular bolt, but has a unique design that provides superior holding power. The fastener comprises of two main components: a threaded pin and a collar. The pin has a pointed end that is inserted through a hole in the two materials that are to be joined. The collar is then placed over the pin and its shank is inserted into the second hole in the materials to be joined. This creates a grip-by-friction fastening system that is quick and easy to use.

How do Hi-Lok Fasteners Work?

Hi-Lok fasteners work by maintaining a high degree of tension between the two materials to be joined. The pin creates an interference fit as it passes through the materials, creating a gripping effect between the collar and the materials surrounding the hole. The fastener is then tightened by taking advantage of the axial preload that has been created. This tension, which is created between the collar and the materials surrounding the hole, results in a strong, vibration-resistant joint.

What are the Advantages of Hi-Lok Fasteners?

One of the primary advantages of Hi-Lok fasteners is their ease of use. Unlike other fastening systems, which require multiple parts and specialized tools, Hi-Lok fasteners only require a single collar, a threaded pin, and a torque wrench. They are also reusable, which significantly reduces both the cost and time that is associated with the installation and maintenance of the fasteners.

Additionally, Hi-Lok fasteners have a high load capacity, which means they are capable of withstanding heavy loads and resist damage from vibration fatigue. The fasteners are also resistant to corrosion, which is critical considering the harsh working environments of many aerospace applications.

What are the Common Applications of Hi-Lok Fasteners?

Hi-Lok fasteners are most commonly used in the aviation and aerospace industries, but they are also commonly used in other industries that require strong, reliable fastening. In the aerospace industry, Hi-Lok fasteners are used on a wide range of components, including wings, fuselages, and engines. They are also used in communications, military, automotive, and heavy equipment industries.

Conclusion

Hi-Lok fasteners are a versatile, reliable, and easy-to-use fastening system that has become a standard in the aviation and aerospace industries. Their unique design provides superior holding power to other threaded fastening systems while maintaining ease of use, strength, and resistance to vibration fatigue. With its many benefits, industries beyond aerospace and aviation are exploring the advantages of Hi-Lok fasteners for their own applications.