The UWS EC20092 is a 58" 5th wheel tool box, built low on purpose so the front cap of a gooseneck or 5th wheel trailer can swing over it without contact. It measures 59" x 18.75" x 11.25", only 11.25" tall, and holds 6.1ft³. The lid is UWS's patented RigidCore design, foam-filled so it does not bow or bind, with gas struts that lift it to a full 90 degrees and hold it there. A MicroSeal gasket runs the perimeter to keep dust and water out. Because this is the EC version, UWS packages it for parcel delivery rather than freight, so it comes to your door without a terminal pickup or a delivery window.
What's Included:
UWS 58" 5th wheel utility chest box, gloss black aluminum
2 keys
Mounting hardware kit (NOT included on all models, see the note below)
UWS installation manual
Features
6.1ft³ of Lockable Storage The box measures 59" x 18.75" x 11.25" overall and holds 6.1ft³. Capacity is UWS's own published figure for this model, not a category average.
Patented RigidCore Foam-Filled Lid The lid is not a hollow aluminum shell. UWS injects a solid foam core between two sheets of aluminum, which stiffens the whole panel so it does not bow in the middle, does not warp in the sun, and does not bind in the latches after a few hundred cycles. It is the difference you notice every time the lid closes squarely instead of needing a shove.
One-Piece Welded Aluminum Tub The tub is formed from a single sheet of extra-thick aluminum and welded, rather than riveted or folded from panels. There are no seams down the corners to leak or split, and aluminum will not rust out from the inside the way a painted steel box does once the coating is chipped.
Gloss Black Powder Coat Over Aluminum The gloss black powder coat finish is applied over aluminum, so even where the coating eventually gets chipped there is no steel underneath to rust. Gloss black gives a deep, wet-looking shine that matches factory black trim and black wheels.
Stainless Steel Paddle Latches, Locking From Either Side Two recessed stainless steel paddle latches with keyed locks, connected inside the box so it opens from the driver's side or the passenger's side. Recessing the latch into the box face means there is nothing sticking out to catch a hip or a cargo strap, and stainless means the lock still turns after a salt winter.
MicroSeal Gasket Around the Lid A closed-cell gasket runs the full perimeter of the opening and compresses when the lid shuts, which is what keeps dust, road spray and rain out of the box. UWS demonstrates it publicly by hitting a closed box with mud and then a pressure washer, and that video is linked on this page.
Built Low for 5th Wheel and Gooseneck Clearance At 11.25" tall this chest is deliberately short so the front cap of a 5th wheel trailer can swing over it. That is the whole reason the model exists: you get real lockable storage in the bed without giving up the towing clearance a full-height chest would eat.
Packaged for Parcel Delivery, Not Freight This is the EC version of the box, which UWS packages specifically so it can ship by parcel carrier instead of on a freight pallet. In practice that means it comes to your door rather than to a terminal you have to drive to, and there is no appointment window to sit through. The box inside is the same box as the freight-only version; only the packaging differs.
Fitment & Compatibility
Application
Fit
Full-size trucks towing a 5th wheel or gooseneck
✓ Yes, this is the designed application
Full-size trucks not towing
✓ Yes, it works as a low-profile 59" bed box
Mid-size trucks
● Check first, the box needs 59" of clear bed floor
Mounting on the bed rails as a crossover
✗ No, this box sits on the bed floor
Fit guidance: This chest sits on the bed floor ahead of the hitch and is kept to 11.25" tall so it clears the swing of a 5th wheel or gooseneck trailer. Measure the distance from your bulkhead to the hitch and the trailer's turning clearance before ordering. IMPORTANT: UWS's own installation manual for this chest states that not all models include a mounting hardware kit, so budget for hardware in case yours ships without it. Installation requires drilling. No vehicle-specific fitment is claimed.
Specifications
UWS Part Number: EC20092
Product Type: 5th wheel utility chest box
Material: Aluminum
Finish: Gloss Black
Storage Capacity: 6.1ft³
Overall Length: 59"
Overall Width: 18.75"
Overall Height: 11.25"
Tub Length: 58"
Tub Width: 18"
Tub Style: Standard
Profile: Standard Profile
Lid Type: Single Lid
Latch Type: Paddle Handle
Carrying Handles: Without Carrying Handles
Product Weight: 33.2 lb
Shipping Weight: 47.73 lb
Shipping Method: Parcel carrier, heavily packaged by UWS for parcel delivery
Installation Difficulty: Easy
UPC: 672078080866
Warranty: Limited lifetime warranty, one-year finish, one-year parts
Country of Origin: USA
Installation
Type: Bolt-through mount to the bed floor, drilling required · Time: About 45 minutes to 1 hour · Tools: Drill with 1/2" and 11/32" bits, ratchet and socket set, tape measure · Difficulty: Easy, rated Easy by UWS, but it does involve drilling the bed floor
Position the chest, mark your holes, and check under the bed for fuel and brake lines, wiring and the tank before drilling. Then bolt it down and torque to the figures in the UWS manual. IMPORTANT: UWS's own manual for this chest states that not all models include a mounting hardware kit, so open the carton and check before you book the job. If hardware is not in the box you will need to supply your own. Two keys are supplied.
Resources
Everything you need for your UWS 58" 5th Wheel Truck Tool Box, Gloss Black, in one place.
Warranty. UWS limited lifetime warranty on the box, with one year on the finish and one year on parts. The warranty covers defects in materials and workmanship; it does not cover damage from overloading, misuse, accident, or improper installation, and it does not cover normal wear to the finish. Keep your proof of purchase. Prestige Truck is an authorized UWS dealer, so warranty claims are handled through the manufacturer's normal process.
Free shipping. This item ships free to the lower 48 states. Because it is an oversized item, it ships by freight and typically arrives in 3 to 7 business days.
Inspect on delivery. Please inspect the packaging before signing. If you see any damage, note it on the delivery receipt and contact us right away, and we will make it right.
About UWS
UWS, United Welding Services, has been welding aluminum truck boxes since 1989 and is now part of the CURT Group within Lippert, which is what puts a national warranty and parts network behind what started as a fabrication shop. The company builds tool boxes, transfer tanks and chests for people who open them every working day, and the engineering choices reflect that: welded one-piece tubs instead of riveted panels, stainless steel latch hardware instead of plated steel, and a foam-filled lid instead of a hollow one.
Two of those choices are worth knowing by name. The patented RigidCore lid sandwiches a solid foam core between aluminum skins, so the lid stays flat and keeps latching squarely long after a hollow lid would have bowed in the middle. The MicroSeal gasket runs the full perimeter of the opening and is what keeps dust and water out. UWS is confident enough in the seal to publish a video of a closed box being hit with mud and then a pressure washer. UWS builds these boxes in Florida: the company's own product copy for this model says it is designed, fabricated and welded there, and the carton is marked Assembled in USA.
This particular listing is from the UWS EC series, which is the same box packaged so it can travel by parcel carrier rather than freight. That is worth money to you: the box arrives at your door instead of a freight terminal, without a delivery appointment to wait on.
Prestige Truck is an authorized UWS dealer. Every box we ship is new, in the manufacturer's carton, and covered by the full UWS limited lifetime warranty.
Compare The Range
How this compares to similar models
The closest alternatives side by side, so you do not have to keep tabs open.
Model
This OneUWS 58" 5th Wheel Truck Tool Box, Gloss Black (EC20092)
UWS drives a pickup onto a closed box to show what the foam-filled RigidCore lid actually withstands.
It is a marketing stunt, but it is a fair demonstration of why a foam-cored lid does not bow in the middle the way a hollow one does.
MicroSeal Weather Test: Tool Box Vs Mud Vs Pressure Washer
UWS packs a closed box with clean rags, buries the outside in mud, then hits it with a pressure washer and opens it up.
It is the clearest demonstration of what the MicroSeal gasket on this box is actually doing.
UWS Damage-Free Delivery, How The EC Boxes Are Packed
This model is an EC box, which is the parcel-shippable version of the UWS range.
This clip shows how UWS packages these boxes to survive a parcel network instead of a freight pallet.
Frequently Asked Questions
Straight answers on specs, fit and support
What are the actual dimensions of the EC20092?
59" x 18.75" x 11.25" overall, holding 6.1ft³. Measure your clear bed floor against those numbers before ordering, and remember to allow for the door or lid to open.
How much does the EC20092 actually hold?
6.1ft³. That figure is UWS's own published capacity for this exact model.
Does it come with mounting hardware?
Check the carton. UWS's own installation manual for this chest states that not all models include a mounting hardware kit and that you may need to supply your own. We would rather tell you that up front than have you find out with the truck in the driveway. Two keys are included, and the install does require drilling.
How does it lock, and can I open it from either side?
It uses two keyed stainless steel paddle latches, and two keys are supplied. The handles are connected inside so the lid opens from either side of the bed.
What is the difference between the EC20092 and the freight-shipped version?
Packaging, not product. UWS builds the EC series as the same box in heavier protective packaging so it can travel by parcel carrier instead of on a freight pallet. For you it means doorstep delivery instead of a freight terminal, and no delivery appointment to wait in for.
Is this gloss black or matte black?
Gloss black. It is a deep, reflective powder coat over aluminum, the finish that matches factory black trim and black wheels. UWS also builds a matte black version of several boxes in this range if you would rather have a flat, non-reflective look. Because the substrate is aluminum, a chip cannot start rust.
Mark K.
Look is great. 100 lbs
Look is great. 100 lbs lighter than my 2nd pick. Lid lock and opening are smooth. Only minor knock I give is the the tie down hooks are hard to install - thinking I should have done them before installing.
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The toolbox is nice. I
The toolbox is nice. I think Ill get a lot of years of service out of it. I like how the lid opens and the tie downs are a nice touch. It seems to be well built. And tough. Im pleased with my purchase and would buy another one.
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