Quick Answer: To use a rivet gun, drill a hole that matches the rivet size, load the rivet into the nose, push it through both parts, and squeeze the handles until the mandrel snaps. Check that the joint is tight. Wear safety glasses and pick a rivet length that suits your material thickness.
A loose trim piece, a rattling heat shield bracket, or a cracked aluminum panel can ruin a good weekend. A rivet gun is a simple hand tool that can help you fasten thin parts without welding or bolts. This guide shows you the full process in plain language, with safety checks and real car examples.
Trust and guidance: This article is for general educational and purchasing guidance only. It does not guarantee specific results and does not replace advice from a qualified professional. Some tasks may require the work of a licensed or registered professional or compliance with local regulations. Always check your vehicle’s manual, warranty terms, and current local rules, and consult a qualified professional when needed.
What a Rivet Gun Actually Does
A rivet gun, also called a pop rivet tool or blind rivet tool, joins two pieces of thin material from one side. The rivet has a hollow body and a thin pin called a mandrel. The gun pulls the mandrel back, which swells the rivet body behind the work. When the pull is strong enough, the mandrel snaps off and leaves a neat, tight fastener.
For car owners, this matters because many jobs are on thin sheet metal, aluminum trim, or plastic-backed panels where you cannot reach the back side. In my testing experience, a basic hand tool handles most small repairs, such as reattaching an underbody panel bracket or a loose license plate mounting plate.
Think of a rivet as a permanent fastener. A bolt can be removed and reused. A rivet usually has to be drilled out. Decide which one you need before you start.
Choose the Right Type of Rivet Gun
Before using a rivet gun, make sure the tool fits your job. Most home garages use a hand-squeeze model. Pneumatic and cordless tools exist for people who set many rivets.
Rivet Gun Types Compared
Decision rule: choose a hand tool if you set fewer than a dozen rivets a year. Choose a powered tool if you restore panels, build trailers, or do regular body work.
Pick the Correct Rivet Before You Start
Most failed rivet jobs come from the wrong rivet, not the wrong squeeze. Check three things: diameter, grip range, and material. Common diameters are 3/32, 1/8, 5/32 and 3/16 inch, which is roughly 2.4, 3.2, 4.0 and 4.8 mm. Your gun needs a nose piece that matches the rivet’s mandrel size.
Grip range is the total material thickness a rivet can clamp. If your panels measure 2 mm together, pick a rivet whose grip range covers that figure. Too short, and the rivet will not clamp. Too long, and the tail can stay loose.
Soft, light, and easy to set. They are often used on trim, light panels and brackets that carry little load.
Stronger than aluminum, but they can rust if the coating is damaged. They suit steel parts that stay dry or get paint protection.
Better for damp or salty conditions. They need a stronger pull, so a basic tool may struggle with larger sizes.
The tail is capped, so water and fumes pass less easily. They are often chosen for outer panels and wet areas.
Note: Try to match the rivet metal to the panel metal where you can. Mixing different metals in damp conditions may speed up corrosion.
The Setup Sequence at a Glance
Here is the whole job in one view, so you can see where each stage fits before you pick up the tool.
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Most mistakes happen in steps 1 to 3. If the hole and rivet are right, the squeeze is the easy part.
How to Use a Rivet Gun Step by Step
These steps apply to a typical hand-squeeze tool. Power tools follow the same pattern, but check the maker’s manual for the trigger and nose details.
Tip: Practice on scrap metal first. When I tried this out on an old aluminum sign, two or three test rivets taught me more about hole size and pull pressure than any chart did.
Is a Rivet the Right Fastener for This Job?
Use this quick path before drilling anything on your vehicle. It helps you avoid riveting parts that should never be riveted.
Yes: stop and call a qualified mechanic. No: go to Q2.
Yes: a rivet may suit. No: consider a bolt, screw or professional repair.
Yes: use a nut and bolt or a rivet nut instead. No: go to Q4.
Yes: proceed with the right rivet. No: set up the job safely first.
If you reached Q4 with all the right answers, you are in a good spot to proceed. A single “stop” answer is enough to pause and rethink.
Safety Rules That Many Guides Skip
A rivet gun looks harmless, but it can pinch fingers, fling metal slivers, and throw the snapped mandrel. Drilling the hole adds sparks, hot swarf and sharp edges. Treat the job like any other metalwork.
Safety Note: Always wear safety glasses, even for one rivet. Keep fingers away from the nose and the handle pivot. Never work near a fuel line, brake line, battery terminal or wiring harness. Disconnect the battery first if any wires run close to your drilling point. For general guidance on eye protection, see the OSHA eye and face protection page or the CCOHS OSH Answers library.
Heads-Up: Before you drill into a panel, look behind it. Fuel lines, brake lines and wiring often run behind body panels and floor sections. If you cannot see the back side, do not drill there.
Pre-Job Check Dashboard
Run through these four checks each time. They take about a minute and prevent most beginner problems.
Jaws clean, handles move smoothly, nose piece tight.
Diameter, length and metal suit the panel and the nose.
Parts clamped, backside clear, battery disconnected if needed.
Safety glasses on, gloves fitted, long sleeves tucked.
If any box stays unticked, fix it first. Skipping the rivet match check is the one I see cause the most rework.
Fixing Common Rivet Gun Problems
Common Issue vs Likely Cause
If a rivet fails, do not set a second one in the same hole. Drill the old one out with a bit the size of the rivet body, then check the hole for damage.
Technique Tips for a Cleaner Result
Good technique matters as much as good tools. Press the nose flat against the work, keep the gun square, and use smooth pressure. For soft or thin materials, a backing washer spreads the load and helps prevent the rivet from pulling through.
Best Practice vs Less Effective Use
Which Rivet Gun Setup Fits Your Car Jobs?
Different jobs call for different setups. This dashboard gives a practical guide rather than a strict rule.
A basic hand tool with aluminum rivets is often enough.
A long-reach lever tool and sealed rivets may suit this better.
A pneumatic or cordless tool saves time over many rivets.
No DIY rivet. Use a qualified mechanic and approved fasteners.
Match the setup to your workload. Buying a heavy-duty tool for one small repair is rarely worth it.
Tool Fit by Vehicle and Job
What Experienced DIYers Check That Beginners Miss
Experienced people look at the whole joint, not just the rivet. They check for sharp edges that could cut a hand later, and they seal exposed metal edges with touch-up paint. They also test with a gentle tug on the part before they trust it.
They also keep a few spare nose pieces and a small tin of mixed rivets. When using a rivet gun on a vehicle, a wrong-size nose piece wastes more time than almost anything else. Keep the jaws clean with a small brush and a drop of light oil on the pivots.
Where Most Beginners Struggle
This bar chart is a practical guide, not research data. It shows which parts of the job usually feel hardest.
Relative complexity (practical guide)
The tool itself is the easy part. Most of the effort is planning the rivet and hole before you squeeze.
DIY or Professional? Know Your Limits
When to DIY vs When to Hire a Professional
When to contact a professional: Call a qualified mechanic or body shop if the part affects braking, steering, suspension or restraint systems, if rust has weakened the surrounding metal, or if the repair follows an accident. Also check your warranty terms and insurance policy before drilling into a vehicle that is still covered, since non-approved modifications may affect them.
Frequently Asked Questions
How do you use a rivet gun for the first time?
Drill a hole that matches the rivet, fit the correct nose piece, and slide the rivet mandrel into the gun. Insert the rivet through both parts, squeeze until the mandrel snaps, and check the joint. Practice on scrap metal first.
What size hole should I drill for a pop rivet?
Check the rivet pack, which usually lists the recommended drill bit size. The hole should be slightly larger than the rivet body so it slides in, but not so large that the rivet spins.
Why won’t my rivet gun snap the mandrel?
The rivet may be too hard or too large for your tool, or the jaws may be dirty or worn. Try a softer rivet, clean the jaws, or use a lever or powered tool.
Can I use a rivet gun on car body panels?
Rivets are often used on non-structural panels, trim and brackets. For structural or crash-related repairs, use a qualified body shop and check the vehicle manufacturer’s repair guidance.
How do I remove a rivet I set wrong?
Drill through the center of the rivet with a bit slightly smaller than the rivet body, then pop off the head and push out the remains. Wear safety glasses and clamp the parts first.
Are rivets strong enough for structural car parts?
Standard pop rivets are not meant for safety-critical parts such as brakes, steering or suspension. Use approved fasteners and have a qualified mechanic do that work.
Final Thoughts
A rivet gun is one of the simplest tools to learn, and a few good habits make a big difference. Pick the right rivet, drill a clean hole, keep the tool square, and wear your safety glasses every time. Practice on scrap first, and you will likely feel confident on real repairs within a few tries.
Know where the tool stops being the right answer. For complex or safety-related work, consult a qualified professional, and check your vehicle’s manual, warranty terms and local regulations before making permanent changes to your vehicle.
