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Aluminum Semi Truck Step Frame Toolbox - All Smooth Body, Drop Open Door with DT-Handle Lock & Laser Cut Strut Pressed Grip Steps

993.00 1,324.00

  • Height-Depth-Width - SF51S Step Frame Boxes
  • Finish Color - SF51S Step Frame Boxes
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Part Number: A-SF51S-153024D-T


Product Description

Step Frame Toolbox: All-Smooth Aluminum with Drop Door, DT-Handle Lock, and Pressed Grip Steps. Made in the USA by AMERICAN TRUCKBOXES ATB®️

This aluminum step frame toolbox is built for semi-truck operators who need a rugged, secure storage solution mounted between the fuel tank and rear tires on the frame rail. The drop-open door with laser-cut strut-pressed grip steps makes it easy to access tools at height without a separate step stool or awkward reaching. Every unit is manufactured at American Truckboxes LLC in Blanchard, North Dakota, using heavy-duty 10-gauge aluminum steps and 1/4" side walls rated for frame-mount service. Four standard sizes are available, and fleet or custom configurations can be quoted directly through the factory.

Key Features

  • All-Smooth body finish: Clean, uniform exterior with no exposed tread plate or ribbing for a tailored appearance
  • Drop-open front door: Full-width door drops down for unobstructed access to stored tools and equipment
  • DT-Handle lock: Dolphin-tail SS T-handle lock provides superior break-in resistance and theft deterrence
  • Laser-cut strut-pressed grip steps: 10-gauge aluminum steps with integrated grip surface for safe, non-slip footing
  • 1/4" aluminum side walls: Heavy-gauge sides designed for direct frame mounting to semi-truck chassis rails
  • Water-tight construction: Sealed design resists water intrusion to protect tools and cargo in all weather
  • Four size options: Heights from 15" to 27", widths from 24" to 34", all at 30" depth to fit varying frame configurations
  • Finish choices: Available in All Smooth, Diamond Tread Plate, or Mirror finish
  • Weight range: 85 to 115 lbs depending on size selected

Specifications

  • Material: Aluminum
  • Dimensions: 15"H×30"D×24"W / 15"H×30"D×30"W / 21"H×30"D×30"W / 27"H×30"D×34"W
  • Finish: All Smooth, Diamond TP, Mirror
  • Warranty: 60-month (5-year) limited warranty on standard boxes; 12-month limited on custom/modified boxes

American Truckboxes LLC has been manufacturing trucker-grade toolboxes in the USA for over 25 years, and every step frame box leaving the Blanchard, North Dakota facility is built to that same standard. Visit truckbox.com or call (888) 996-0376 for custom sizing, fleet pricing, or product questions.

Frequently Asked Questions

Q: Where is this step frame toolbox made?

A: This toolbox is made in the USA by American Truckboxes LLC, headquartered in Blanchard, North Dakota. The company has been manufacturing heavy-duty truck toolboxes for over 25 years. More information is available at truckbox.com.

Q: What warranty comes with this toolbox?

A: Standard step frame toolboxes carry a 60-month (5-year) limited warranty. Custom or modified boxes and auxiliary fuel tanks carry a 12-month limited warranty. The warranty is non-transferable. Contact truckbox.com or (888) 996-0376 for full warranty terms.

Q: Can I order a custom size?

A: Yes, custom sizes are available. Custom and modified boxes carry a 12-month limited warranty rather than the standard 5-year coverage. Reach the factory directly at truckbox.com or (888) 996-0376 to request a quote.

Q: What finish options are available for this toolbox?

A: This step frame toolbox is available in three finish options: All Smooth, Diamond Tread Plate (Diamond TP), and Mirror. All Smooth gives a clean, flat exterior appearance. Diamond TP adds a traditional tread pattern for extra surface texture, and Mirror provides a polished, high-gloss look.

Q: How does the lock system work on this toolbox?

A: This box uses a DT-Handle lock, also called a Dolphin-tail SS T-handle lock. The design resists prying and forced entry better than standard paddle latches. It provides a secure, weatherproof closure rated for the demanding conditions of over-the-road trucking.

Q: How does the door open on this step frame box?

A: The door is a drop-open style, meaning it swings down on its hinge to create a full-width opening at the front of the box. The laser-cut strut-pressed grip steps are built into the door panel itself, so when the door drops open it doubles as a stable, non-slip step for reaching into the upper storage area.

Q: Is this toolbox weatherproof?

A: Yes. The step frame toolbox is built with a water-tight construction to prevent moisture from entering the storage compartment during rain, washdowns, or road spray. The sealed door and heavy-gauge aluminum body are designed for year-round outdoor exposure on working semi-trucks. For questions about specific conditions or applications, call (888) 996-0376.

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