How to Mount An Under Tray Tool Box

Looking to free up tray space and add some sleek, secure storage to your vehicle? Mounting an under tray tool box is a smart way to do just that. Whether you're a tradie keeping your tools organised or just want a tidy space for your gear, under tray boxes are super handy. If you’re wondering how to mount an under tray tool box, this guide has you covered with clear, simple steps.

Step 1: Choose the Right Tool Box

Before we get into the nuts and bolts (literally), start by picking a tool box that suits your setup. 

Here’s what to consider:

• Size & Fit: Measure the space under your tray to ensure the box will fit without interfering with other parts, such as the suspension or exhaust.
• Material: Aluminium is lightweight and rust-resistant, while steel is heavier but super tough. If you’re still unsure, check out our breakdown on aluminium vs steel truck tool boxes.
• Design Features: Look for secure locks, weather seals, and internal compartments to suit your storage style.

Need ideas? Take a look at our range of under tray tool boxes to find the perfect match.

Step 2: Gather Your Gear

Here’s what you’ll need:

• Under tray tool box.
• Mounting brackets (usually included).
• Drill and drill bits.
• Measuring tape.
• Bolts, nuts, washers.
• Socket wrench set.
• Safety gear (gloves and glasses).

Step 3: Plan Your Spot

Figure out exactly where you want the tool box to go. It should sit under the tray without blocking access to anything important. Also, try to keep it balanced to avoid uneven weight on your vehicle.

Step 4: Attach the Brackets

Secure the mounting brackets to the underside of your tray or chassis. If needed, use your drill to make holes, then bolt them down tightly. Double-check that everything is aligned and solid before moving on.

Step 5: Mount the Tool Box

Now for the fun part. Lift the tool box into place and line it up with the bracket holes. Mark where you’ll need to drill into the box (if it doesn’t already have holes), then take it down and carefully drill those spots. Bolt the box to the brackets, and make sure everything’s tight and rattle-free.

Step 6: Check It All Over

Give it a once-over to make sure:

• The box is level and secure.
• There's enough clearance from the ground.
• Nothing’s in the way of opening the lid.

Test it a few times to be sure it opens and closes smoothly.

Step 7: Maintain It Like a Pro

To keep your under tray tool box in top shape:

• Check bolts and brackets regularly.
• Clean out dirt and grime.
• Keep an eye on the locks and seals.

Want to know if these boxes are worth the investment? We’ve answered that in our post —are underbody truck boxes worth it?

Get Organised & Store Smarter

So, now you know how to attach an under tray tool box the right way. It’s a simple project that makes a big difference in how you store and access your tools or gear. Once it's in place, you’ll wonder how you ever lived without it.

Ready to upgrade your setup? Tools In A Box has everything you need to start—from heavy-duty under tray tool boxes to the matching mounting gear.

Browse Tools In A Box now and take the next step toward smarter, cleaner, and more secure storage.