American Truckboxes - Manufacturer of Toolboxes
Semi Truck and Trailer Boxes and Toolboxes

Underbody Truck and Trailer Toolboxes

Storage Box for Trailers & Semi-Trucks

Underbody Trailer Toolboxes in Aluminum
Underbody Truck and Trailer Toolboxes - ATRG Series
Aluminum Smooth or Diamond Tread Body with Smooth, Diamond Tread or Mirror Finish Doors
Underbody Trailer Tool Boxes in Steel
Underbody Trailer and Truck Boxes - STRG Series
Steel Powder Coated Finish

Please call 1-888-996-0376 or
e-mail us for pricing and available sizes.
Online ordering is available at

Our super heavy duty underbody truck and trailer toolboxes are available in several finishes: aluminum smooth body or diamond tread body with doors in a stainless steel mirror finish, or a smooth aluminum finish, or a bright aluminum tread finish. All underbody toolboxes feature a t-handle locking system.

Door choices include single or double side open doors, or single or double drop open doors.

These underbody trailer and truck boxes can be mounted on the side of a trailer frame, under a trailer deck, or on a semi-tractor. Use these storage boxes and toolboxes to store your chains and binders, or any other tools you need for your trailer or truck. These toolboxes feature a fully concealed rain gutter and bulb-type automotive sealing door gasket.

Reference Documents:


Underbody Toolboxes
Side open aluminum marine grade smooth finish

Rack Tool Boxes
Double side opening door, shown open

Rack Toolboxes
Double drop open door
Underbody Toolboxes
Double side open doors,
mounted on semi-tractor
Underbody Tool Boxes
Underbody double drop open doors,
mounted on semi-truck
Underbody Trailers
Single side open door,
mounted on semi-truck frame
Underbody Trailers
Double side open doors,
mounted on trailer frame

Need a custom-designed or custom-sized underbody box for your truck or trailer? Contact us!!


American Truckboxes

American Truckboxes, LLC®

American Truckboxes, LLC
15750 6th Street SE
Blanchard, ND 58009
Toll-free: 1-888-996-0376
Phone: (701) 636-0376
Fax: (701) 636-0380
Office Hours (CST):
Monday through Friday
8:00 to 12:00 noon
1:00 to 5:00 p.m.
Sales Department:


We accept Visa, Mastercard, American Express and Discover
Home | Products | Order Form | Search | Blog | Customer Service | Request Info | Contact Us