Best Aluminum Underbody Tool Box for Trucks and Trailers

#1 · Best Overall

1. Buyers Products 1705105

• Dimensions: 36"L x 18"W x 18"H
• Weight: 43 lb
• Material: Aluminum

Best for: High-capacity work-truck storage.

Why it ranks #1: The 36 x 18 x 18-inch aluminum box lists 6.75 cubic feet of capacity and uses a locking compression latch to pull its door against the gasket.

A 6.75-cubic-foot capacity gives the Buyers Products 1705105 room for substantial work-truck or trailer gear while keeping it in an underbody box. Its 36-by-18-by-18-inch dimensions make it a larger-format option for buyers who can accommodate its footprint and 43-pound weight.

The .100-inch diamond-tread aluminum construction combines corrosion resistance with a rugged surface for demanding truck and trailer applications. Its locking die-cast compression latch pulls the recessed door against a gasket, helping secure contents and reduce rattling in transit. The 6.75-cubic-foot capacity supports storing more supplies together, while the 36-by-18-by-18-inch dimensions and 43-pound weight are important practical considerations when planning mounting and handling.

Skip it if you want a lighter 36-inch box; the Parts-Diyer underbody toolbox is listed at 24.5 pounds.

This Buyers Products box suits work-truck or trailer owners needing its 6.75 cubic feet and compression-latched door. Check that the 36-by-18-by-18-inch footprint and 43-pound handling weight suit the intended underbody mounting spot.

Listed on Amazon as: Buyers Products 1705105 36 x 18 x 18 Inch Aluminum Underbody Tool Box

#2 · Best Listed Load

2. VEVOR 36-Inch Underbody Box

• Dimensions: 36"L x 14"W x 16"H
• Weight: 24.7 lb
• Material: Aluminum

Best for: Multi-location truck storage.

Why it ranks #2: This 36 x 14 x 16-inch box weighs 24.7 pounds and lists a 110-pound maximum load recommendation, a useful combination for lighter-duty storage.

A rubber sealing strip helps keep contents protected when the VEVOR box is closed, making it useful for tools or camping gear carried beneath a truck or trailer. Its 36-by-14-by-16-inch format also suits other mounting spots, including a camper’s rear or a pickup rack.

The aluminum body is listed as rust- and corrosion-resistant, waterproof, and scratch-resistant, supporting outdoor storage across truck, trailer, and camper use. A lockable T-handle latch and two included keys provide a way to secure stored gear, while the rubber sealing strip helps guard contents from water when shut. The 110-pound maximum weight recommendation gives buyers a stated loading limit; its 36-by-14-by-16-inch dimensions help assess available mounting space before installation.

Skip it if you need more than the stated 110-pound load recommendation; the Buyers Products 1705105 lists 6.75 cubic feet of capacity.

Choose this VEVOR for truck, trailer, or camper storage when its 36-by-14-by-16-inch footprint fits the mounting area. Its seal and lock suit protected gear storage, but keep the stated 110-pound limit in view.

Listed on Amazon as: VEVOR Underbody Truck Box, 36"×14"×16" Pickup Storage Box, Heavy Duty Aluminum Diamond Plate Tool Box with Lock and Keys, Waterproof Trailer Storage Box with T-Handle Latch for Truck, Van, Trailer

#3 · Welded-Seam Pick

3. Parts-Diyer 36-Inch Box

• Dimensions: 36"L x 17"W x 18"H
• Weight: 24.5 lb
• Material: Aluminum

Best for: Sealed RV and trailer gear.

Why it ranks #3: Its 36 x 17 x 18-inch aluminum body has fully welded seams and thickened rubber sealing strips, with a lid trough designed to block road splash.

Fully welded seams are the defining feature of this Parts-Diyer box, helping resist bending, shaking, and weld cracking during bumpy under-vehicle travel. Its thick rubber seals and improved lid trough are intended to block rain, road splash, dust, and salt from stored tools and camping equipment.

At 36 by 17 by 18 inches, the aluminum box provides underbody storage for a pickup, RV, trailer, or ATV, with the listed mounting versatility extending to those vehicle types. The tight-fitting rubber sealing strips and lid trough help protect contents from road exposure, while fully welded seams address deformation concerns on rough drives. Its 24.5-pound listed weight also supports lifting it off and remounting it when storage needs change.

Skip it if you have limited mounting length; the ARKSEN 24-inch underbody box has a shorter listed length.

Consider this Parts-Diyer for RV, trailer, or pickup owners who want sealed storage and welded construction for bumpy travel. Its 36-by-17-by-18-inch dimensions still need to suit the available underbody space.

Listed on Amazon as: 36 Inch Full Weld Aluminum Underbody Tool Box, Dual Anti-Pry Lock, Water Resistant, Anti-Deformation, Lockable Under Mount Large Storage Chest for Pickup Truck, Trailer, RV, ATV

#4 · Dual-Lock Pick

4. TUFFIOM 36-Inch Box

• Dimensions: 36"L x 17"W x 18"H
• Weight: 26.5 lb
• Material: Aluminum

Best for: Dual-lock trailer storage.

Why it ranks #4: The 36 x 17 x 18-inch aluminum box weighs 26.5 pounds and lists two stainless-steel keyed locks for buyers prioritizing its dual-lock design.

Two stainless-steel keyed security locks give the TUFFIOM box a dual-lock approach to storing tools beneath a truck, van, or trailer. Its 36-by-17-by-18-inch aluminum body adds a diamond-pattern surface, which the supplied details associate with compression resistance and reduced slippage.

The corrosion-resistant aluminum construction makes this a practical candidate for outdoor vehicle storage, while the diamond pattern is specified to enhance compression resistance and prevent slippage. Two stainless-steel locks with keys secure the contents, and the product is listed as weathertight for buyers seeking protection in exposed mounting locations. At 36 by 17 by 18 inches and 26.5 pounds, it calls for sufficient mounting room and a suitable installation plan.

Skip it if you need a shorter box for a compact mounting spot; the ARKSEN 24-inch model has a shorter listed length.

The TUFFIOM fits buyers prioritizing two keyed locks and a weathertight aluminum box for truck, van, or trailer use. Make sure its 36-by-17-by-18-inch body fits the intended mounting location.

Listed on Amazon as: TUFFIOM 36"x17"x18" Aluminum Underbody Truck Box, Heavy Duty Aluminum Diamond Plate Tool Box with Lock and Keys, Waterproof Trailer Storage Box with T-Handle Latch for Truck, Van, Trailer

#5

5. AutoForever 36-Inch Box

• Dimensions: 36"L x 17"W x 18"H
• Weight: 26.5 lb
• Material: Aluminum

Best for: Multi-vehicle underbody storage.

Why it ranks #5: This 36 x 17 x 18-inch aluminum box weighs 26.5 pounds and is listed for underbody use on pickups, flatbeds, trailers, RVs, ATVs, and dump trucks.

At a listed 26.5 pounds, the AutoForever aluminum box offers a relatively light 36-by-17-by-18-inch format for underbody storage. The mounting applications include pickups, flatbeds, trailers, RVs, ATVs, and dump trucks, so buyers can consider it beyond a conventional pickup installation.

Underbody mounting is intended to save valuable truck-bed space for cargo, letting tools travel in a separate storage location. The aluminum construction is described as lightweight and corrosion-resistant, supporting use across the listed vehicle types without adding a steel box. Its 36-by-17-by-18-inch dimensions provide a concrete footprint to compare with available mounting room, and the title identifies a lock for securing stored equipment.

Skip it if you need a shorter box for a constrained mounting area; the ARKSEN 24-inch underbody box has a smaller listed length.

Pick the AutoForever for buyers seeking a 36-inch underbody box across pickups, flatbeds, trailers, RVs, or ATVs. Its footprint must fit the vehicle, and underbody mounting is the space-saving approach described.

Listed on Amazon as: 36 Inch Aluminum Truck Bed Underbody Tool Box, 36"L x 17"W x 18"H,w/Lock

#6

6. MOTORHOT 36-Inch Box

• Dimensions: 36"L x 17"W x 18"H
• Weight: 24.5 lb
• Material: Aluminum

Best for: Camper and trailer storage.

Why it ranks #6: Its 36 x 17 x 18-inch aluminum format is aimed at RVs, campers, and trailers, with a lockable T-handle and two keys listed in the title.

Travel trailers, campers, and RVs are the MOTORHOT box’s explicit focus, with under-frame mounting intended to add storage for towing gear, camp supplies, and emergency kits. The 36-by-17-by-18-inch diamond-plate aluminum chest also lists use on utility trailers, dump trucks, and flatbeds.

Its under-frame application can give trailer owners a separate place for accessories when onboard storage is limited. Diamond-plate aluminum supplies the stated construction, while the lockable T-handle latch and two keys provide a way to secure contents during travel. The listed weight is 24.5 pounds, and the 36-by-17-by-18-inch size helps buyers assess mounting space. Its material is classified as light-duty, a relevant boundary for equipment selection.

Skip it if you need a box explicitly classified for heavy-duty use; the Buyers Products 1705105 specifies .100-inch-thick diamond-tread aluminum.

This MOTORHOT box suits campers and trailer owners adding under-frame space for travel gear and emergency supplies. Its light-duty material classification matters when choosing what to store, and the 36-inch length needs room beneath the vehicle.

Listed on Amazon as: 36 Inch Aluminum Underbody Tool Box, RV Trailer Flatbed Storage Box, Weather‐Resistant Utility Tool Chest with T‐Handle Latch & 2 Keys for Campers,Dump Truck

#7 · Thick-Plate Pick

7. ANLU LOAD Underbody Box

• Dimensions: 12"L x 16"W x 14"H
• Material: Aluminum

Best for: Compact sealed tool storage.

Why it ranks #7: This smaller aluminum box lists 0.100-inch thickness, hand-welded seams, a compression latch, and a replaceable rubber gasket; dimensions are 12 x 16 x 14 inches.

A replaceable rubber sealing gasket is a practical distinction of the ANLU LOAD box, helping keep stored tools dry and dust-free when the door is closed. Its 0.100-inch diamond-tread aluminum and hand-welded seams specify a rugged construction for a compact underbody storage format.

The compression latch and T-handle lock, supplied with two keys, provide a way to secure the contents while pulling the door closed against its gasket. The replaceable seal offers a maintenance option if the gasket needs attention over time. At 12 by 16 by 14 inches, the box has a compact footprint for tool storage, while its .100-inch aluminum and welded seams support the stated durability and corrosion resistance.

Skip it if you need a longer box for larger equipment; the AutoForever 36-inch underbody toolbox lists a 36-by-17-by-18-inch format.

The ANLU LOAD suits buyers seeking a compact tool box with a replaceable gasket, compression latch, and keyed T-handle lock. Its 12-by-16-by-14-inch dimensions limit the storage envelope, so check the gear’s required space.

Listed on Amazon as: Underbody Truck Tool Box, 14" x 16" x 12",0.100" Thick

#8

8. ARKSEN 24-Inch Rotary Box

• Dimensions: 24"L x 17"W x 17.71"H
• Weight: 15 lb
• Material: Aluminum

Best for: Compact underbody equipment storage.

Why it ranks #8: At 24 x 17 x 17.71 inches and 15 pounds, it offers a more compact alternative, with a two-position rotary latch and keys included.

A 24-inch length makes the ARKSEN 002-24UB-DP-SL a shorter underbody option than the listed 36-inch boxes, helping buyers work with a more compact mounting area. Its diamond-pattern aluminum body and two-position rotary latch address durability and securing tools or supplies during travel.

The 24-by-17-by-17.71-inch dimensions and 15-liter listed capacity define a compact storage envelope for trucks and semis. A full weather seal is specified to help keep moisture out, while the rotary-style two-position latch helps protect against theft and weather. The tool-less quick-release door with stainless-steel D-handles is described as easy to grip with gloves, supporting access when handling equipment outdoors or at work.

Skip it if you need a larger listed capacity for bulky gear; the Buyers Products 1705105 specifies 6.75 cubic feet.

Choose this ARKSEN for truck or semi owners needing a compact, sealed box with glove-friendly handles. Its 15-liter capacity is the key boundary, so match it to smaller tools and supplies rather than bulky cargo.

Listed on Amazon as: 24" x 17" x 18" Underbody Tool Box, Heavy Duty Storage Chest,Silver

#9

9. ARKSEN 24-Inch T-Handle Box

• Dimensions: 24"L x 17"W x 17.71"H
• Weight: 15 lb
• Material: Aluminum

Best for: Welded compact storage.

Why it ranks #9: This 24 x 17 x 17.71-inch aluminum box weighs 15 pounds and lists hand-welded seams, a T-handle, and an all-round seal.

Hand-welded seams distinguish this 24-inch ARKSEN box, adding structural strength to its solid-aluminum construction for underbody storage. Its tool-less quick-release door and stainless-steel T-handle are specified for easy gripping, including with gloves, so routine access need not require tools.

The 24-by-17-by-17.71-inch body gives buyers a compact footprint to compare with an underbody mounting area. A tight all-round seal is described as shielding contents from water and moisture, while the rotary two-position latch helps protect against theft. The quick-release door and stainless-steel T-handle support access in work settings, and the welded seams contribute structural strength for outdoor equipment storage.

Skip it if you need a longer box for more underbody storage; the AutoForever 36-inch aluminum toolbox has a longer listed format.

This ARKSEN suits buyers who value welded construction, sealed storage, and quick access in a compact 24-inch box. Check that its shorter length provides enough room for the tools and supplies you plan to carry.

Listed on Amazon as: 24"x17"x18" Underbody Tool Box, Heavy Duty Storage Chest, Silver

#10

10. caqeg 36-Inch Toolbox

• Dimensions: 15"L x 8"W x 5"H
• Material: Aluminum

Best for: Daily tools and towing gear.

Why it ranks #10: The title describes a 36 x 17 x 18-inch underbody box, but its specifications list 15 x 8 x 5 inches, so buyers should verify its actual dimensions.

A thickened aluminum structure is specified to handle daily stacking and placement of heavy tools, making this caqeg toolbox relevant for maintenance, towing, emergency, or camping gear. Its 36-inch title and space-saving underbody format target buyers seeking additional vehicle storage without using the main cargo area.

The supplied description lists storage dimensions of 36 by 17 by 18 inches and says the interior is intended to organize daily or professional equipment. A lock and two keys are included, providing a way to secure items for use on the go. Its listed mounting applications include a hitch rack, camper cargo rack, enclosed-trailer tongue, and RV rear, giving buyers several possible locations to consider for extra storage.

Skip it if you need consistent published measurements before choosing a mounting location; the AutoForever box lists matching 36-by-17-by-18-inch dimensions.

This caqeg box may suit buyers organizing tools or towing gear on a hitch rack, camper, trailer, or RV. Resolve the conflicting dimensions in its supplied listing before planning a specific installation.

Listed on Amazon as: 36 Inch Aluminum Underbody Truck Toolbox with Lock and Keys