How Do You Use A Rivet Gun – For Permanent Metal Fastening Projects

ByJim Boslice Metalworking & Fabrication

To use a rivet gun, insert the rivet mandrel into the tool’s nozzle, place the rivet body into your pre-drilled hole, and squeeze the handles until the mandrel snaps off.

Always ensure the rivet size matches your drill bit diameter and that the material stack-up fits within the grip range of the fastener.

If you have ever stared at two pieces of sheet metal and wondered how to join them without messy welds or bulky bolts, you are in the right place. Riveting is one of the most reliable, clean, and satisfying ways to create a permanent mechanical bond in your workshop projects.

I know that picking up a new tool can be intimidating, but I promise that once you master this simple process, you will find yourself reaching for your rivet gun for everything from custom automotive panels to simple home repairs. It is a fundamental skill that bridges the gap between basic tinkering and professional-grade fabrication.

In this guide, we are going to walk through exactly how do you use a rivet gun, the safety gear you need, and the small adjustments that separate a loose, wobbly joint from a rock-solid, vibration-resistant connection. Let’s get your bench setup ready and dive into the mechanics of blind rivets.

Understanding the Basics of How Do You Use a Rivet Gun

At its core, a pop rivet—or blind rivet—is a two-part fastener consisting of a hollow body and a headed pin called a mandrel. When you pull the trigger or squeeze the handles of the gun, the tool pulls that mandrel back through the body. This forces the body to bulge and expand on the “blind” side, effectively clamping your materials together.

Learning how do you use a rivet gun requires understanding that the tool is essentially a high-leverage puller. You aren’t just squashing metal; you are applying precise tension until the mandrel snaps, leaving the expanded rivet body to hold your work in place.

Before you start, make sure you have the right nozzle tip installed on your gun. Most manual rivet guns come with a set of interchangeable nosepieces that correspond to different rivet diameters, such as 1/8-inch, 5/32-inch, or 3/16-inch. Using the wrong tip will cause the mandrel to slip or jam inside the tool.

Step-by-Step Guide to Setting a Perfect Rivet

Once your materials are clamped and your holes are drilled, the actual setting process is straightforward. Precision during the preparation phase is what makes the final result look professional.

  1. Prepare the hole: Use a drill bit that is just slightly larger than the diameter of the rivet body. A loose hole makes for a weak joint, while a hole that is too tight will make it difficult to insert the fastener.
  2. Insert the rivet: Place the body of the rivet through the aligned holes of the materials you are joining. Ensure the flange is sitting flush against the top surface.
  3. Seat the gun: Slide the rivet mandrel into the nosepiece of the rivet gun until the nosepiece is firmly against the head of the rivet.
  4. Squeeze the handles: Apply steady pressure to the handles of the gun. You may need to squeeze more than once for larger rivets to fully draw the mandrel through.
  5. Snap the mandrel: Continue squeezing until you feel or hear the mandrel snap off. This indicates that the rivet is fully set and expanded on the backside.

Choosing the Right Materials and Fasteners

Not all rivets are created equal, and choosing the wrong material can lead to galvanic corrosion—a process where two dissimilar metals react and degrade each other. If you are joining aluminum, stick with aluminum rivets. If you are working with stainless steel, use stainless or compatible steel rivets to maintain structural integrity.

Always check the grip range of your rivets. This is the total thickness of the materials you are joining. If your material stack is too thin, the rivet won’t expand properly; if it is too thick, the mandrel will snap before the rivet is fully set.

Pro tip: Keep a selection of backing washers in your shop. If you are fastening soft materials like plastic or thin sheet metal, a backing washer prevents the rivet from pulling through the hole under tension, creating a much stronger surface area.

Common Mistakes and Troubleshooting Tips

Even experienced makers run into issues occasionally. The most common problem is the rivet spinning in the hole. This usually happens because the hole was drilled too large. If this occurs, you may need to drill it out and move up to the next size of rivet.

Another frequent frustration is the mandrel getting stuck in the nosepiece. This often happens if you don’t keep the gun square to the surface. Always keep the tool perpendicular to your work piece; if you tilt it while squeezing, the mandrel can bind or snap prematurely.

If you find that your joints feel loose despite using the right size, check your clamping. Rivets do not have the same “pull-down” force as a threaded bolt. You must ensure the two pieces of material are tightly clamped together before you pop the rivet.

Safety Practices for Metalworking Projects

Working with metal involves sharp edges and flying debris. Whenever you are drilling holes for rivets, always wear ANSI-rated safety glasses. Metal shavings are notorious for finding their way into eyes, and they are incredibly difficult to remove once embedded.

Also, be mindful of the “snap” when the mandrel breaks. The tail end of the mandrel is often sharp and can fly off with surprising velocity. If you are working in a tight space, try to cup your hand over the head of the gun to catch the spent mandrel, or look for rivet guns that include a small collection bottle for the waste stems.

Lastly, keep your hands clear of the pinch points on the handles of the rivet gun. Heavy-duty manual guns have a lot of leverage, and it is remarkably easy to catch a finger if you aren’t paying attention to your grip.

Frequently Asked Questions About How Do You Use a Rivet Gun

Can I use a rivet gun on wood?

Generally, no. Rivets are designed for metal, plastic, or composite materials. Because wood is porous and soft, a rivet will likely just pull through the material or fail to expand correctly. Stick to screws or bolts for woodworking.

What if the rivet doesn’t pull tight?

If the rivet is loose, you likely have a gap between your materials. You must ensure the surfaces are clamped tightly together before riveting. If the gap remains, the rivet will expand in the void rather than against the backside of the metal.

How do I remove a rivet if I make a mistake?

The best way to remove a rivet is to drill out the center head. Use a drill bit that is roughly the same diameter as the rivet body, and apply light pressure. The head will eventually pop off, allowing you to punch the remainder of the shank through the hole.

Are there different types of rivet guns?

Yes. You have standard hand-held pliers, heavy-duty lever-style guns (which require less hand strength), and pneumatic or cordless electric guns for high-volume production. For the average garage DIYer, a lever-style manual gun is usually the best balance of cost and ease of use.

Final Thoughts on Mastering Your Workshop Skills

Mastering how do you use a rivet gun is a rite of passage for any serious DIYer. It transforms your ability to build custom brackets, repair vintage gear, and execute clean, permanent metalwork without needing a full welding setup.

Start with small test pieces of scrap metal. Practice until you can get a consistent, flush finish every time. Once you have the feel for the tool, you will find that these little fasteners are some of the most versatile items in your workshop. Now, grab some rivets, fire up the drill, and get to building something that lasts.

Jim Boslice
Latest posts by Jim Boslice (see all)

Similar Posts