How To Use A Rivet Nut – A Pro Guide For Strong Metal Fastening

ByJim Boslice Metalworking & Fabrication

A rivet nut, or “nutsert,” provides a permanent threaded hole in thin materials like sheet metal where a standard nut won’t fit. You install it by inserting it into a pre-drilled hole and using a specialized tool to collapse the sleeve, locking it firmly against the backside of the material.

Ever tried to attach a bracket to a hollow metal tube, only to realize you can’t get a wrench inside to hold a nut? We’ve all been there, staring at a project that seems impossible to finish because the backside is inaccessible.

I promise that by the end of this guide, you will have the confidence to install these fasteners like a seasoned pro. You’ll stop relying on flimsy sheet metal screws and start building connections that actually last.

Let’s walk through the essential steps of how to use a rivet nut so you can get back to building your latest workshop project. Whether you are outfitting a van, fixing a trailer, or modifying a garage workbench, this technique is a total game-changer.

Understanding the Basics of Rivet Nut Installation

Learning how to use a rivet nut is essentially about mastering the art of creating a “blind” threaded fastener. Unlike a traditional bolt that needs a nut on the other side, these fasteners do all the work from one side of the metal.

They consist of a threaded insert with a collapsible sleeve. When you apply pressure with a setting tool, the sleeve crushes against the backside of your workpiece, creating a solid, permanent anchor for your bolts or machine screws.

Why Choose Rivet Nuts Over Other Fasteners?

Sheet metal screws often strip out after just a few removals, which is a headache for any garage tinkerer. Rivet nuts provide a machine-thread connection that can be tightened and loosened repeatedly without losing structural integrity.

They work perfectly in materials that are too thin to tap with a traditional thread. If you are working with aluminum, steel, or even certain rigid plastics, this is often the cleanest, most professional solution available.

Choosing the Right Materials and Hardware

Before you start drilling, you need to ensure you have the correct supplies. Not all fasteners are created equal, and choosing the wrong metal can lead to galvanic corrosion or failure under load.

Selecting the Correct Material

  • Aluminum: Great for lightweight projects and easy to install, but not ideal for high-stress areas.
  • Steel: The most common choice for general workshop and automotive applications.
  • Stainless Steel: Essential if your project will be exposed to moisture or outdoor elements to prevent rust.

Matching the Grip Range

Every rivet nut has a grip range, which is the thickness of the material it is designed to fasten. Always measure your metal thickness with a caliper before buying.

If the material is too thin, the fastener won’t tighten properly. If it is too thick, the sleeve won’t collapse, and the fastener will simply spin in the hole.

How to use a rivet nut in four simple steps

When you are ready to get to work, follow this sequence to ensure a solid, vibration-resistant connection. Precision at the start saves a massive amount of frustration later.

1. Drill the Perfect Hole

The hole size is critical. Most manufacturers provide a specific drill bit size for every fastener diameter. A hole that is too large will lead to a loose fit, while a hole that is too tight makes insertion difficult.

Use a deburring tool to clean the edges of the hole after drilling. Sharp metal burrs can prevent the flange of the rivet nut from sitting flush against your surface.

2. Threading the Tool

Screw the rivet nut onto the mandrel of your installation tool. Ensure it is threaded all the way down so the tool is fully engaged with the internal threads of the insert.

If you don’t have a specialized tool, you can make a DIY version with a bolt, a nut, and a few washers. However, for repetitive tasks, a dedicated hand-operated rivet nut setter is a much better investment.

3. Setting the Fastener

Insert the rivet nut into the hole and keep it square to the surface. Squeeze the handles of your setting tool firmly to compress the sleeve.

You will feel the resistance increase as the sleeve begins to deform. Once you feel the tool “bottom out” or reach the end of its stroke, stop applying pressure.

4. Releasing the Mandrel

Rotate the tool’s knob or reverse the handle to unscrew the mandrel from the newly installed fastener. The rivet nut should now be securely locked into the metal, ready for your bolt.

Common Mistakes to Avoid

Even experienced makers trip up occasionally. The most common error is failing to hold the tool perfectly perpendicular to the surface. If you tilt the tool, the fastener will install at an angle, making it impossible to thread your bolt in straight.

Another frequent issue is over-tightening. While you want a secure grip, applying excessive force can strip the internal threads of the insert before it is even finished. Always follow the manufacturer’s torque recommendations if provided.

Workshop Safety and Material Considerations

Safety is non-negotiable in the workshop. When drilling holes for your fasteners, always wear safety glasses to protect your eyes from metal shards.

If you are working with thin-gauge sheet metal, watch for sharp edges created by the drill bit. Use a file or a specialized deburring tool to smooth these edges immediately.

Finally, consider the environment of your project. If you are building something that will be subject to constant vibration, add a drop of low-strength thread locker to your bolts to ensure they don’t back out over time.

Frequently Asked Questions About Rivet Nuts

Can I remove a rivet nut once it is installed?

Yes, but it isn’t designed to be “uninstalled.” You will typically need to drill the head off the fastener using a drill bit slightly larger than the hole, then tap the body out of the hole. It is a destructive process, so make sure your placement is correct the first time.

Do I need a special tool, or can I use a wrench?

While you can create a makeshift setter using a bolt and a nut, it is difficult to get consistent results. A dedicated rivet nut tool provides consistent pressure and makes the job significantly faster and more reliable.

Are rivet nuts strong enough for structural applications?

They are excellent for mounting accessories, brackets, and panels, but they are not intended for critical structural load-bearing joints. Always use traditional bolts and nuts for primary structural support in heavy-duty machinery or vehicle frames.

What if the rivet nut starts spinning in the hole?

This usually means the hole was drilled too large or the fastener wasn’t compressed enough. If it spins, you may have to carefully drill it out and install a slightly larger size or use a small amount of epoxy to secure it, though replacing it is always the better choice.

Mastering Your Metalwork

Learning how to use a rivet nut is a classic “level-up” moment for any DIYer. It transforms how you look at sheet metal projects, turning a frustrating limitation into a world of endless mounting possibilities.

Don’t be afraid to grab some scrap metal and practice your technique a few times before jumping into your main project. Once you get the feel for the tension, you will find yourself reaching for these fasteners on almost every build.

Stay safe, keep your tools sharp, and enjoy the process of turning raw materials into finished, professional-grade work. Happy building!

Jim Boslice
Latest posts by Jim Boslice (see all)

Similar Posts