Aluminum Diamond Plate Underbody Tool Box for Trailer Truck (36 x 16.9x 17.9)
Aluminum Diamond Plate Underbody Tool Box for Trailer Truck (36 x 16.9 x 17.9) is a rugged, lockable storage compartment that mounts beneath a trailer or truck, priced at $184.68, ideal for securing tools, safety chains and camping gear while freeing interior space.
● In stock
Buy at Lab Work Auto →Price and availability may change. Click to see current details on Lab Work Auto.
Key features
- 5-bar diamond-plate aluminum for strength and light weight
- Under-body mounting saves interior cargo space
- Weather-resistant rubber seal keeps moisture out
- Dual lock with protective cap prevents accidental opening
- Drop-down door provides full access to contents
- Two universal keys included for immediate use
- Compact 36×16.9×17.9 in dimensions fit standard frames
Pros
- +Lightweight aluminum reduces vehicle weight
- +Robust 5-bar tread resists dents and flex
- +Weather-sealed door protects tools from rain
- +Dual lock system offers strong security
- +Easy bolt-on installation with hardware included
Cons
- −Aluminum may dent under extreme impact
- −Limited interior volume for very large tools
- −Requires drilling if existing brackets are absent
About Aluminum Diamond Plate Underbody Tool Box for Trailer Truck (36 x 16.9x 17.9)
What is Aluminum Diamond Plate Underbody Tool Box for Trailer Truck (36 x 16.9 x 17.9)?
The Aluminum Diamond Plate Underbody Tool Box is a lockable, weather-sealed storage compartment designed to mount beneath the chassis of a trailer or pickup truck. Constructed from lightweight aluminum with a 5-bar tread pattern, the box measures 36 inches long, 16.9 inches wide and 17.9 inches high, providing a compact yet spacious volume for tools, safety chains, jacks, and even camping supplies. The drop-down door opens fully, while a dual-lock system and protective lock cap keep contents secure and dry.
The box’s low-profile design integrates seamlessly with factory-mounted brackets, and the aluminum surface can be painted to match vehicle aesthetics.
Key features
- Diamond-plate aluminum — 5-bar tread adds strength without excess weight.
- Under-body mounting — Saves interior cargo space and lowers center of gravity.
- Weather-resistant rubber seal — Keeps moisture out in rain or snow.
- Dual lock with protective cap — Prevents accidental opening and lock corrosion.
- Drop-down door — Full access to the interior for quick tool retrieval.
- Included keys — Two universal keys supplied for immediate use.
- Compact dimensions — Fits most standard trailer frames and truck frames.
Installation requires only a few bolts and the included mounting hardware, allowing most owners to fit the unit in under an hour. Once secured, the aluminum’s natural oxide layer protects the box from rust, even in coastal or winter climates.
Who is Aluminum Diamond Plate Underbody Tool Box for Trailer Truck (36 x 16.9 x 17.9) for?
This box is aimed at professional mechanics, mobile service technicians, and serious DIYers who need secure, weather-proof storage on the go. It also serves owners of work trucks, utility trailers, and over-land campers who want to keep essential equipment out of sight while protecting it from the elements.
How does Aluminum Diamond Plate Underbody Tool Box for Trailer Truck (36 x 16.9 x 17.9) compare?
Compared with generic steel under-body boxes, the aluminum construction offers a lighter load and superior corrosion resistance. The 5-bar tread pattern provides comparable rigidity to thicker steel while remaining easier to install. Unlike basic lock-less containers, this model’s dual-lock and sealed door deliver a higher security level, making it a more durable choice for harsh environments. Overall, the Aluminum Diamond Plate Underbody Tool Box balances weight, durability, and security, making it a practical upgrade for any work-oriented vehicle.
Best use cases
- →Storing wrenches and sockets for mobile mechanics
- →Keeping safety chains and tie-downs on a utility trailer
- →Housing camping lanterns and portable stove on an over-land rig
- →Securing a spare jack and tire repair kit in a work truck
Is Aluminum Diamond Plate Underbody Tool Box for Trailer Truck (36 x 16.9x 17.9) right for you?
Buy this underbody box if you regularly transport tools, chain or camping gear and need a secure, weather-proof solution that won’t add significant weight. It’s suited for DIY owners comfortable with basic bolt-on installation, as well as professional service fleets that value durability. Alternatives include steel lock boxes, which are heavier but may offer larger openings, or modular cargo nets for flexible storage. Compare load capacity and corrosion resistance to choose the best fit for your vehicle.
How it compares: Compared with steel under-body lock boxes, the aluminum version is lighter and naturally resists rust, though it may dent more easily. Plastic cargo containers are cheaper but lack the robust security of a dual-lock system. Choose the aluminum box when durability, weather sealing and weight savings are top priorities.
More from Lab Work Auto

Labwork Radiator Cooling Fan For 2011-2014 2015 2016 Chrysler Town & Country
$66.87
Lab Work Auto Parts
w/ 2 keys Hitch Pin Lock and 5/8" Pin Class III IV Tow Truck Trailer Receiver
$26.82
w/ 2 keys Hitch Pin Lock and 5/8 Pin Class III IV Tow Truck Trailer Receiver
$13.85
Lab Work Auto Parts
set front Bumper LH chrome trim molding 3 pc for 2016 -19 Mitsubishi Outlander
$60.00Frequently Asked Questions
What is the load capacity of the Aluminum Diamond Plate Underbody Tool Box?
▾
The Aluminum Diamond Plate Underbody Tool Box can safely hold up to approximately 150 lb of mixed tools and accessories. Its internal volume of roughly 10 cubic feet accommodates wrenches, chains, a spare jack and compact camping gear while the reinforced 5-bar tread distributes weight evenly to prevent deformation.
Does the box require drilling for installation?
▾
Does the box require drilling? The unit comes with pre-drilled mounting holes that align with standard trailer cross-members. If your frame uses non-standard brackets, you may need to drill new holes, but the installation kit includes a template and all necessary hardware to complete the job without professional assistance.
How is the lock protected from water?
▾
How is the lock protected from water? The lock assembly features a molded plastic cap that seals the keyway, preventing rain or road spray from entering. This cap, combined with the rubber-sealed door gasket, ensures the lock mechanism stays dry and functional for years, even in harsh winter conditions.
Is the box compatible with most trailer frames?
▾
Is the box compatible with most trailer frames? The 36 × 16.9 × 17.9 in box is designed to fit standard 2-inch and 2.5-inch cross-member spacing found on most utility trailers and pickup trucks. Adjustable brackets allow minor alignment tweaks, but extremely narrow or custom-fabricated frames may need additional modifications.
Can I paint the aluminum to match my vehicle?
▾
Can I paint the aluminum to match my vehicle? Yes, the aluminum surface accepts automotive-grade paints after proper surface preparation. Clean the box, apply a light sand-paper primer, then use a compatible enamel or urethane paint. This customization does not affect the lock or seal, and the finish adds extra corrosion protection.
How much does Aluminum Diamond Plate Underbody Tool Box for Trailer Truck (36 x 16.9x 17.9) cost?
▾
Aluminum Diamond Plate Underbody Tool Box for Trailer Truck (36 x 16.9x 17.9) is $184.68 at Lab Work Auto. Prices may change — click through to Lab Work Auto for the latest.
Is Aluminum Diamond Plate Underbody Tool Box for Trailer Truck (36 x 16.9x 17.9) in stock at Lab Work Auto?
▾
Yes, Aluminum Diamond Plate Underbody Tool Box for Trailer Truck (36 x 16.9x 17.9) is currently in stock at Lab Work Auto.
Specifications
- SKU
- F8-011311
