How to Install Daken Toolboxes Using Daken Brackets Under a Truck Body

November 26, 2025
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A technician with installation tools beside a Daken toolbox bracket, with TransQuip branding and the text “Quick Guide to Mounting Toolboxes.”

Underbody Toolbox Installation Guide (Using Brackets)

Installing a toolbox under a truck using the correct brackets ensures your tools are secure, protected, and easily accessible. Follow these step-by-step instructions for a safe and accurate installation.

What You Need to Install an Underbody Toolbox

  • Daken toolbox
  • Daken brackets
  • Drill with suitable bits
  • Washers and bolts (provided with the brackets)
  • Torque wrench or spanners
  • Measuring tape
  • Safety gloves and eye protection

Step-by-Step Installation Process

Step 1: Assemble Toolbox Brackets

Begin by assembling the Daken brackets on the toolbox. Drill the fixing points on the external lateral sides of the toolbox and ensure that all bolts use washers.

If you are using “U” brackets, drill additional holes on the forepart of the bottom of the toolbox. Make sure the brackets are correctly aligned before proceeding to the next step.

Daken vertical bracket fitted to toolbox, showing fixing points on the external lateral side for secure installation
Daken horizontal bracket fitted to toolbox, showing fixing points for secure under-body installation

Step 2: Verify Bracket Alignment

To prevent torsion or twisting of the toolbox body, ensure the fixing angle of the brackets is orthogonal (90°). Also, confirm that the contact surfaces between the brackets and the truck frame are parallel. Proper alignment at this stage ensures the toolbox sits securely and evenly under the truck body.

Vertical Daken bracket installation showing orthogonal 90° fixing angle and parallel contact surfaces to prevent torsion.
Horizontal Daken bracket installation showing correct 90° fixing angle and parallel surfaces to avoid toolbox body torsion.

Step 3: Position and Align the Toolbox

Before permanently fixing the toolbox, check that it is well-aligned under the truck. The toolbox should sit flush against the brackets with no gaps or uneven spacing. Make adjustments as needed before tightening all fasteners.

Toolbox positioned on brackets, showing alignment check before final fixing.

Step 4: Secure Toolbox to Brackets

Once aligned, fix the toolbox securely to the brackets using the provided bolts and washers. Ensure all bolts are tightened to the recommended torque specification to prevent movement during transit.

Toolbox fixed to brackets with bolts and washers after alignment.

Step 5: Perform Final Safety Check

  • Confirm that the toolbox opens and closes smoothly.
  • Ensure no contact with the truck body that could cause wear.
  • Verify all bolts are properly tightened.
  • Make sure the installation does not affect vehicle clearance or underbody components.
Technician inspecting a securely mounted toolbox to ensure it opens and closes correctly.

Tips for a Safe Installation

  • Always wear PPE when drilling or handling heavy tools.
  • Work on a level surface and ensure the vehicle is stationary with the wheels chocked.
  • Follow the weight limits recommended for the toolbox and brackets.

Conclusion

Correctly installing a Daken toolbox using Daken brackets under a truck body ensures your tools are secure, your workspace is organised, and your truck remains safe on the road. Always check bracket alignment and bolt torque for optimal performance.

For more details on Daken toolboxes and brackets, explore the full range of Daken Truck Toolboxes available from TransQuip.

Compatible Brackets and Matching Toolboxes

Use this guide to identify which Daken brackets fit which toolboxes for safe and compliant under-body installation.

Bracket ↔ Toolbox SKU Links

FAQs About Underbody Toolbox Installation

How secure are underbody toolboxes?

Underbody toolboxes from TransQuip are designed with robust mounting options using steel brackets, ensuring a strong, stable attachment under trucks, vans, and trailers. Proper installation with the correct brackets and fasteners provides protection against theft and environmental exposure, keeping your tools and equipment safe.

Pricing depends on the toolbox material, size, and whether a bracket kit is included. Entry-level plastic boxes are more budget-friendly, while heavy-duty steel or stainless steel models cost more. Bracket kits vary in price based on depth and material, typically ranging from £20-£60, depending on size and finish.

Toolbox Bracket Set Notes / Fitment Info
Daken “Just 400” 21 L Plastic Toolbox (400×350×300 mm) STEEL PRO Horizontal Brackets (≤ 400 mm deep) Shallow depth, correct for under-body mounting.
Daken “Blackit 1” Plastic Storage Box BLACKIT Bracket Set (trailer side-boards / cold galvanised) Suitable for trailer or side-mounted applications.
Daken “ZEN12” Polished Stainless Steel Toolbox (AISI 304) Horizontal Bracket Set for 400 mm deep toolboxes – Hot Galvanised Heavy-duty stainless toolbox for truck/lorry under-body mounting; galvanised bracket for corrosion resistance. Ideal as an ADR toolbox for vehicles carrying hazardous goods.
  • Assemble the brackets and drill fixing points on the toolbox, ensuring washers are used.
  • Check the fixing angle is orthogonal (90°) to avoid torsion and ensure parallel contact surfaces.
  • Align the toolbox properly before permanent fixing to ensure stability and safe use.

Brackets are designed for specific box depths, weights, and mounting types. Always match the toolbox dimensions and material with the correct bracket kit to ensure secure installation and compliance with safety standards.

You can explore the full range of TransQuip Toolboxes & Brackets to find the right combination for your vehicle.

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