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  1. Underbody Tool Box
  2. UWS
  3. 36 Inch Long
  4. Medium Capacity
  5. Aluminum
  6. 18 Inch Wide
UWS Underbody Toolbox - Single Door - 6.8 cu ft - Gloss Black

UWS Underbody Toolbox - Single Door - 6.8 cu ft - Gloss Black

Item # UWS04018
Our Price: $759.95
You Save: $76.00
Underbody Tool Box
This item qualifies for Free Shipping
Shipping Weight: 40 lbs
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36" Long x 18" wide x 18" deep; 6.8 cubic feet; underbody box with foam filled lid and t-handle; aluminum construction - black finish Great Prices for the best underbody tool box from UWS. UWS Underbody Toolbox - Single Door - 6.8 cu ft - Gloss Black part number UWS04018 can be ordered online at or call 1-800-940-8924 for expert service.
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UWS Underbody Tool Box - UWS04018

  • 36 Inch Long
  • Medium Capacity
  • UWS
  • Aluminum
  • 18 Inch Wide
  • 18 Inch Tall
  • Trailer Underbody Box
  • Truck Underbody Tool Box
  • Black

36" Long x 18" wide x 18" deep; 6.8 cubic feet; underbody box with foam filled lid and t-handle; aluminum construction - black finish


  • Mountable above or under flatbed truck or trailer
  • Heavy-duty aluminum construction with fully welded seams - guaranteed not to rust
  • Black powder coating
    • Best base finish for painting color to match the truck
  • Heavy gasket forms a watertight seal
  • Unique "water channel" weatherproof design
  • Dust barrier helps to protect contents from the elements
  • Secure T-handle with brass lock
  • Lid opens 90 degrees
  • Made in the USA


  • Dimensions: 36" long x 18" wide x 18" high
    • Door opening measures: 31-1/2" long x 13" high
  • Capacity: 6.8 cu ft of usable space
  • Construction: 0.080 aluminum tread plate
  • Lock includes 2 keys
  • Limited lifetime warranty

diagram of toolbox dimensions

The Underbody Box provides convenient storage above or under your flatbed truck, dump truck, or trailer body. The T-handle includes a brass lock on the lid and will ensure the security of your tools. The weatherproof design of the compartment door includes a heavy gasket and unique "water channel" that will protect your possessions from the elements. The box is constructed of thick aluminum for a more heavy-duty, durable box that can take abuse and constant wear and tear from the road.

EC40092 Black Finish Single-Lid Underbody Toolbox by United Welding Services (UWS)



See what our Experts say about this UWS Underbody Tool Box

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  • Most detailed, accurate underbody tool box information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
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    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
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    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
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