Rivet nuts, are threaded inserts that provide strong and permanent threads in thin materials such as sheet metal, plastics, or composite panels. They are especially useful when the base material is too thin to support a tapped thread or where only one side of the material is accessible for installation. Used widely in the automotive, aerospace, electronics, furniture, and construction industries, rivet nuts combine convenience with strength in a simple yet effective fastening solution.

What Is a Rivet Nut?

A rivet nut is essentially a tubular rivet with internal threads. It is inserted into a pre-drilled hole and then deformed from one side using a tool to securely lock it in place. Once installed, the internal threads are ready to accept a mating screw or bolt.

Types of Rivet Nuts include:

Round Body Rivet Nuts – For general-purpose use.

Hex Body Rivet Nuts – Prevent rotation in soft materials.

Countersunk Rivet Nuts – Sit flush with the surface.

Closed-End Rivet Nuts – Protect against water and debris ingress.

Advantages of Rivet Nuts

Blind Installation – Only one side of the workpiece needs to be accessible.

Strong Internal Threads – Ideal for thin or soft materials.

Fast and Reliable – Quick to install and remove.

Versatile Applications – Compatible with a wide range of materials and environments.

No Welding Required – Reduces heat distortion and simplifies the process.

Installation Process of Rivet Nuts

Installing a rivet nut involves the following five key steps:

1. Prepare the Hole

Drill a clean, round hole in the base material to match the outer diameter of the rivet nut.

Use a deburring tool to remove any sharp edges.

2. Select the Rivet Nut

Choose a rivet nut that matches your material thickness, hole size, and load requirements.

Verify that the thread type matches the intended fastener (e.g., M6, 1/4"-20, etc.).

3. Install on Tool

Thread the rivet nut onto the mandrel of a rivet nut installation tool. There are several tool types:

Manual hand tools

Pneumatic/hydraulic tools

Cordless battery tools

4. Place in the Hole

Insert the rivet nut into the hole until the flange rests against the material surface.

5. Compress the Rivet Nut

Squeeze the tool handles or activate the power tool to collapse the unthreaded portion of the rivet nut behind the panel.

This action forms a bulge that clamps the material, locking the rivet nut in place.

After installation, the rivet nut remains firmly seated and is ready to accept bolts or screws for permanent or removable connections.

Best Practices

Always ensure the hole size matches the manufacturer's recommendations.

Use torque-limiting tools to avoid damaging the threads during installation.

Choose corrosion-resistant materials (e.g., stainless steel or aluminum rivet nuts) for outdoor or harsh environments.

Applications

Rivet nuts are widely used in applications where weld nuts or tapped holes are impractical:

Automotive panels and chassis

Aircraft interiors

HVAC systems

Metal furniture assembly

Electrical enclosures

Summary

Rivet nuts provide a cost-effective and efficient way to add threads to thin or inaccessible materials. With their blind installation capability and strong mechanical performance, they are a preferred solution for both high-volume production and maintenance work. By following the correct installation process and selecting the right rivet nut type, users can ensure durable and secure fastening for a wide range of applications.