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Warranty: Limited Lifetime Warranty (One-Year Finish, One-Year Parts)
Finish: BRIGHT ALUMINUM
Material: Aluminum
Part Type: SIDE MOUNT
UWS underbody tool boxes provide unbeatable storage and security for your items under the bed of your truck or trailer. The box conveniently mounts underneath the bed of a flatbed truck, dump truck or trailer, leaving more space on top of the bed for other cargo. Each box features a corrosion-resistant aluminum construction, heavy-duty cable door supports and a stainless steel locking system -- all to keep your equipment and valuables safe and easily accessible whenever needed. Each UWS underbody tool box is constructed from extra-thick aluminum for increased structural strength. The tub is welded together into a single piece for weather resistance and to easily hold heavy tools and other items. The door features aircraft-grade stainless steel cables, rated to support up to 1,000 lbs., ensuring reliable strength and door operation. The locking mechanism of this underbody truck tool box provides excellent security for your items, featuring a stainless steel, key-operated T-handle. Stainless steel construction supplies the lock with long-lasting corrosion resistance, and the door also has a MicroSeal gasket, blocking moisture, dust and insects from getting inside and damaging your valuables. The door also opens a full 90 degrees for easier access. UWS truck tool boxes are available in multiple sizes to accommodate any storage need. Like all UWS products, each one is proudly assembled right here in the USA for style and long-lasting dependability.

UWS designs and builds heavy-duty truck tool boxes and storage for tradespeople and truck owners. The line covers crossover and side-mount boxes, chest boxes, underbody boxes, transfer tanks and dog boxes. Every aluminum box is designed, fabricated and welded in Perry, Florida, with construction aimed at job-site abuse, road vibration and daily use.
UWS is a leading manufacturer and designer of truck tool boxes and truck accessories, and a Lippert brand. The company's focus is narrow and deliberate: storage that stands up to being opened and slammed shut dozens of times a day, loaded past what looks reasonable, and left outdoors in whatever weather the job brings. Its customers are electricians, plumbers, contractors, farmers, outdoorsmen and truck owners who treat a pickup as a working tool rather than transport.
The catalog covers the full range of bed storage. Crossover boxes sit across the bed behind the cab in single-lid, gull-wing, secure-lock and low-profile styles, so there is a fit whether the priority is capacity, rear visibility or working under a tonneau. Side-mount boxes mount along the bed rails and keep the bed floor free for cargo, while underbody boxes tuck beneath the frame rails of service bodies and flatbeds.
Beyond the bed, UWS makes portable chest boxes that move between vehicles and the shop, transfer tanks and combination tank-and-toolbox units for crews working away from fuel supply, and insulated, ventilated dog boxes for hunters and handlers.
Manufacturing sits at the centre of the brand's identity. Every UWS aluminum tool box is designed, fabricated and welded in Perry, Florida, by tradespeople with decades of experience, and the company's Rooted in Trades initiative is built around that connection to skilled manual work. Boxes use heavy-gauge aluminum, continuous welds at the seams, weather stripping to seal against rain and dust, and locking systems intended to resist tampering. The practical result is storage that keeps tools dry, organized and where they were left.
Experts available to answer your questions
Call 888-634-9494Limited Lifetime Warranty (One-Year Finish, One-Year Parts)
The kit includes one underbody tool box and one key. Hardware is not included; you must purchase your own fasteners separately. The manual recommends contacting a local truck up-fitter or equipment dealer for mounting brackets and installation assistance.
The tool box may be mounted on various truck types and chassis styles. However, the manual does not specify exact vehicle models, years, bed lengths, cab styles or drivetrains. Contact your local truck up-fitter or equipment dealer to confirm fitment for your specific vehicle.
Yes. Mounting brackets are not included and must be purchased separately. The manual specifies that mounting brackets should always be equal to or thicker than 1/4" steel. Contact your local truck up-fitter or equipment dealer for bracket selection and installation.
Hardware is not included with the tool box. You must purchase your own fasteners. The manual provides general torque specifications for metric (M6, M8, M10, M12) and SAE (1/4", 5/16", 3/8", 7/16", 1/2") bolts. If you purchase hardware, use the torque specifications provided with that hardware rather than the general guidelines in the manual.
The manual recommends contacting your local truck up-fitter or equipment dealer for installation and mounting bracket selection. While the difficulty level is listed as "Easy," professional installation is advised because the tool box must be properly supported underneath and mounted with appropriate brackets, and drilling may be required to avoid damage to brake lines, fuel lines, electrical wires and fuel tanks.
Before drilling into your truck bed, check under your vehicle to ensure the drill location does not puncture, cut or obstruct any brake or fuel fluid lines, electrical wires, fuel tanks, or other components. Precaution must be taken that all fasteners near the fuel tank do not create the possibility of fuel tank puncture or other damage during a collision. Do not interfere with factory-installed safety equipment.
General torque specifications are M6 bolt: 3 ft-lbs.; M8 bolt: 7 ft-lbs. However, if you purchase hardware, use the torque specifications provided with that hardware instead of these general guidelines.
General torque specifications are 1/4" bolt: 3 ft-lbs.; 5/16" bolt: 7 ft-lbs. However, if you purchase hardware, use the torque specifications provided with that hardware instead of these general guidelines.
General torque specifications are 3/8" bolt: 16 ft-lbs.; 7/16" bolt: 20 ft-lbs. However, if you purchase hardware, use the torque specifications provided with that hardware instead of these general guidelines.
The general torque specification is 1/2" bolt: 28 ft-lbs. However, if you purchase hardware, use the torque specifications provided with that hardware instead of this general guideline.
General torque specifications are M10 bolt: 16 ft-lbs.; M12 bolt: 28 ft-lbs. However, if you purchase hardware, use the torque specifications provided with that hardware instead of these general guidelines.
No. Do not use this product for storing or transporting flammables, explosives, hazardous materials or hazardous waste, such as containers of gasoline, solvents, gun powder, dynamite, propane tanks, acetylene tanks and cutting torches. Danger of explosion.
Yes. Never exceed the vehicle manufacturer's recommended capacity. Consult your vehicle's owner manual or manufacturer for the specific weight limit.
Use mild automotive detergent to clean the product. Do not use dish detergent, abrasive cleaners, abrasive pads, wire brushes or other similar products that may damage the finish. For polished, gloss and other smooth finishes, polish may be used to clear small scratches and scuffs. After installation, treat or seal all fasteners and exposed metal in any holes drilled in the vehicle to prevent corrosion.
No. Do not modify this product. Use it only for the purposes for which it was designed. Consult your dealer if you have any questions regarding the installation, operation, use and limits of the product.
The tool box fits various truck types and chassis styles, but the manual does not specify exact models or years. Contact your local truck up-fitter or equipment dealer to confirm fitment for your vehicle.
You must purchase mounting brackets (1/4" steel or thicker), fasteners (bolts and nuts), and any other hardware needed for your specific vehicle. The kit includes only the tool box and one key.
The manual does not explicitly state whether drilling is required. Before any drilling, you must check under your vehicle to ensure the drill location does not puncture brake lines, fuel lines, electrical wires, fuel tanks or other components. Contact your truck up-fitter or equipment dealer for installation guidance.
Use the torque specifications provided with your purchased hardware. General guidelines are provided for metric (M6: 3 ft-lbs., M8: 7 ft-lbs., M10: 16 ft-lbs., M12: 28 ft-lbs.) and SAE bolts (1/4": 3 ft-lbs., 5/16": 7 ft-lbs., 3/8": 16 ft-lbs., 7/16": 20 ft-lbs., 1/2": 28 ft-lbs.), but hardware-specific specifications take priority.
Do not store flammables, explosives, hazardous materials or hazardous waste (gasoline, solvents, propane, acetylene, etc.). Use only for tools and non-hazardous items. Never exceed your vehicle manufacturer's recommended capacity.
Use mild automotive detergent. Do not use dish detergent, abrasive cleaners, abrasive pads or wire brushes. For smooth finishes, polish may be used to clear small scratches. Seal all fasteners and exposed metal in drilled holes to prevent corrosion.
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