A rivet nut, also known as a threaded insert or blind rivet nut, is a tubular fastener with internal threads. It's designed to be installed in a pre-drilled hole in a workpiece, creating a secure threaded connection. Widely used across industries like automotive, aerospace, electronics, and furniture, rivet nuts offer a dependable and efficient fastening solution.
How to Install a Rivet Nut
Rivet nut installation involves several steps:
Prepare the Workpiece:
Choose the optimal location for the rivet nut.
Determine the necessary hole size based on the rivet nut specifications.
Drill a precise hole in the workpiece, ensuring it's clean and free from debris.
Insert the Rivet Nut:
Align the rivet nut with the pre-drilled hole.
Insert the rivet nut fully, ensuring the flange (if present) is flush with the workpiece's surface.
Apply Pressure for Deformation:
Use manual, pneumatic, or hydraulic tools depending on the application's scale.
Manual tools involve a threaded shaft and handles to deform the rivet nut.
Pneumatic tools utilize compressed air to power a piston for deformation.
Hydraulic tools employ hydraulic pressure for heavy-duty applications.
Deformation and Expansion:
As pressure is applied, the rivet nut collapses and expands outward.
The expanded rivet nut creates a tight grip on the workpiece, preventing rotation.
The threaded interior forms a secure, load-bearing connection.
Advantages of Using Rivet Nuts
Load-Bearing Capacity: Rivet nuts excel at handling high torque and pull-out forces, making them ideal for applications demanding strong connections.
Versatility: Suitable for various materials like metal, plastic, and composites, rivet nuts offer flexibility in fastening options.
Blind Installation: One of the key benefits is the ability to install from one side, making them perfect for enclosed or inaccessible areas.
Time and Cost Efficiency: Faster installation compared to traditional methods like welding or tapping leads to reduced labor costs and increased productivity.
Conclusion
Rivet nuts are a remarkable fastening solution for creating strong threaded connections in various materials. Their unique design and installation process make them adaptable, efficient, and cost-effective. By understanding their mechanics and advantages, engineers and manufacturers can confidently utilize rivet nuts in a wide range of applications.