A strong fifth-wheel tool box provides enclosed, lockable truck-bed storage while leaving room to couple and tow; it suits truck owners who need to carry tools without giving up trailer clearance. The UWS models here specifically describe fifth-wheel clearance, while the Dee Zee chests offer more stated capacity and the Tulga model uses lightweight polymer. Capacity ranges from 6.1 cubic feet for several UWS boxes to 14.9 cubic feet for the black Dee Zee chest.
Those figures do not tell the whole fitment story: listed dimensions, lid clearance, and mounting position still matter. This roundup compares the supplied product details rather than assuming a box fits every truck.
Check your bed and hitch measurements before choosing, especially when product listings omit a complete set of dimensions.
The UWS EC20093 is the leading choice because its listing explicitly says it provides fifth-wheel coupling and towing clearance, and it pairs that purpose-built design with a 6.1-cubic-foot capacity, heavy-wall aluminum, and a RigidCore foam-filled lid. It also has a stainless steel locking system and MicroSeal gasket in the supplied product information. Choose it if you want a black, matte-finish box with stated fifth-wheel clearance; verify the measurements against your truck bed and hitch before ordering.
Our Top Picks
Best OverallIts listing explicitly promises fifth-wheel coupling clearance, with 6.1 cubic feet of capacity, heavy-wall aluminum, a RigidCore lid, and a MicroSeal gasket.
View on Amazon
Bright AluminumThis 58-inch UWS model is designed for fifth-wheel clearance and has a 6.1-cubic-foot capacity, heavy-wall aluminum construction, and a RigidCore lid.
View on Amazon
Gloss BlackThe 58-inch box is purpose-built for fifth-wheel clearance and offers 6.1 cubic feet, heavy-wall aluminum, and a foam-filled RigidCore lid.
View on Amazon- Highest Capacity Dee Zee DZ8560W
Compare fifth-wheel boxes by fit, finish, and storage
| # | Product | Weight | Capacity | Material | Buy |
|---|---|---|---|---|---|
| 1 | 1. UWS EC20093Best Overall | 47.7 lb | 6.1 cubic feet | Aluminum | View on Amazon |
| 2 | 2. UWS EC20081Bright Aluminum | 39 lb | — | Aluminum | View on Amazon |
| 3 | 3. UWS EC20092Gloss Black | 40 lb | 6.1 cubic feet | Aluminum | View on Amazon |
| 4 | 4. UWS FWB-58Bright-finish fifth-wheel clearance | 32.2 lb | 6.1 cubic feet | Aluminum | View on Amazon |
| 5 |  5. Dee Zee DZ8560WHighest Capacity | — | — | Aluminum, Stainless Steel | View on Amazon |
| 6 |  6. Dee Zee DZ8560WBHigh-volume contractor chest | 66 lb | 14.9 cubic feet | Aluminum, Stainless Steel | View on Amazon |
| 7 |  7. DE ZE DZ8560WCorrosion-resistant enclosed storage | — | 200 lb | Aluminum, Stainless Steel | View on Amazon |
| 8 |  8. Tulga 44-Inch Polymer BoxLightweight polymer trailer storage | 25 lb | 9.5 cubic feet | Plastic | View on Amazon |
Detailed Reviews: Best Fifth Wheel Tool Boxes For Trucks
#1 · Best Overall
1. UWS EC20093
- Weight: 47.7 lb
- Capacity: 6.1 cubic feet
- Material: Aluminum
Best for: Tow-clearance aluminum storage.
Why it ranks #1: Its listing explicitly promises fifth-wheel coupling clearance, with 6.1 cubic feet of capacity, heavy-wall aluminum, a RigidCore lid, and a MicroSeal gasket.
Fifth-wheel clearance is the defining feature of the UWS EC20093: its truck-bed chest leaves room for coupling and towing while keeping gear enclosed. A foam-filled RigidCore lid adds structural support, and the 58-inch matte-black aluminum box offers 6.1 cubic feet of storage for tools and cargo.
The low-profile fifth-wheel layout supports towing clearance, while the 6.1-cubic-foot capacity provides enclosed room for job gear. UWS’s RigidCore lid uses solid foam to strengthen the lid and help prevent binding, which supports repeated opening and closing. Extra-thick, diamond-plate aluminum gives the box a durable yet lightweight construction, and the MicroSeal gasket is specified to seal out dust, debris, and moisture. Its 58-inch width suits buyers seeking a substantial bed-mounted chest without giving up trailer coupling clearance.
- Fifth-wheel clearance for coupling and towing
- RigidCore foam-filled lid helps resist binding
- 6.1-cubic-foot storage capacity
- MicroSeal gasket helps keep out dust, debris, and moisture
- Its 6.1-cubic-foot capacity is smaller than the Dee Zee DZ8560WB’s 14.9 cubic feet.
Skip it if you need a 14.9-cubic-foot chest; the Dee Zee DZ8560WB provides more listed storage capacity.
Choose this UWS for truck owners who tow a fifth wheel and want enclosed aluminum storage with a reinforced lid. Its 6.1-cubic-foot capacity is the boundary for buyers carrying especially bulky loads.
Full product details
| Brand | uws |
|---|---|
| Capacity | 6.1 cubic feet |
| Color | Black |
| Included Components | 5th Wheel Tool Box Matte Black Aluminum 58" 5th Wheel Truck Tool Box (Heavy Packaging) |
| Item Weight | 47.7 pounds |
| Manufacturer | UWS |
| Part Number | EC20093 |
| Manufacturer Warranty Description | Limited Lifetime Warranty (One-Year Finish, One-Year Parts) |
| Material | Aluminum |
| Material Features | Durable and lightweight one-piece aluminum construction with a Diamond Plate surface |
| Model Number | EC20093 |
| Special Features | Lockable |
| Recommended Uses | Tools |
| Special Feature | Lockable |
| Style | Modern |
| Style Name | Modern |
| Additional Information | Important information |
Listed on Amazon as: UWS EC20093 58-Inch Matte Black Heavy-Wall Aluminum 5th Wheel Truck Bed Tool Box, RigidCore Lid
View on Amazon#2 · Bright Aluminum
2. UWS EC20081
- Weight: 39 lb
- Material: Aluminum
Best for: Bright aluminum RigidCore chest.
Why it ranks #2: This 58-inch UWS model is designed for fifth-wheel clearance and has a 6.1-cubic-foot capacity, heavy-wall aluminum construction, and a RigidCore lid.
A bright aluminum finish sets the UWS EC20081 apart in this 58-inch fifth-wheel chest, while its low-profile layout preserves clearance for coupling and towing. The foam-filled RigidCore lid adds structural strength and helps prevent binding, supporting enclosed truck-bed storage during regular trailer use.
The fifth-wheel clearance feature addresses a practical bed-space constraint: storing tools without blocking coupling and towing. Extra-thick aluminum provides the box’s structural material, while the RigidCore lid uses solid foam to maximize strength and help prevent binding during opening and closing. UWS also lists a MicroSeal gasket to seal out dust, debris, and moisture, which helps protect stored gear. The 58-inch width and bright finish suit buyers who want a long aluminum chest with a lighter appearance.
- Fifth-wheel clearance for coupling and towing
- Extra-thick aluminum construction
- RigidCore foam-filled lid helps prevent binding
- MicroSeal gasket helps seal out dust, debris, and moisture
- A storage capacity is not stated in the supplied specifications.
Skip it if you need a stated cubic-foot capacity before choosing; the Dee Zee DZ8560WB lists 14.9 cubic feet.
Choose the EC20081 for fifth-wheel owners seeking a bright-finish aluminum chest, towing clearance, and a reinforced lid. Buyers who need a published capacity figure should weigh that specification boundary before selecting it.
Full product details
| Brand | uws |
|---|---|
| Color | Silver |
| Included Components | 58" 5th Wheel Truck Tool Box |
| Dimensions | 18"W x 58"H |
| Item Weight | 39 pounds |
| Manufacturer | UWS |
| Part Number | EC20081 |
| Manufacturer Warranty Description | Limited Lifetime Warranty (One-Year Finish; One-Year Parts) |
| Material | Aluminum |
| Material Features | Extra-thick, bright aluminum finish |
| Model Number | EC20081 |
| Style | Updated Packaging |
| Style Name | Updated Packaging |
| Additional Information | Important information |
Listed on Amazon as: UWS EC20081 58-Inch Heavy-Wall Aluminum 5th Wheel Truck Bed Tool Box, RigidCore Lid
View on Amazon#3 · Gloss Black
3. UWS EC20092
- Weight: 40 lb
- Capacity: 6.1 cubic feet
- Material: Aluminum
Best for: Gloss-black tow-clearance chest.
Why it ranks #3: The 58-inch box is purpose-built for fifth-wheel clearance and offers 6.1 cubic feet, heavy-wall aluminum, and a foam-filled RigidCore lid.
The UWS EC20092 combines fifth-wheel towing clearance with a gloss-black, 58-inch aluminum chest. Its foam-filled RigidCore lid is intended to maximize strength and help prevent binding, while 6.1 cubic feet of enclosed capacity provides space for truck-bed tools and cargo.
Fifth-wheel clearance lets owners use the truck bed for storage while preserving room for trailer coupling and towing. The 6.1-cubic-foot capacity gives tools and cargo an enclosed place, and the extra-thick aluminum construction supports a durable chest format. UWS’s RigidCore lid uses solid foam to increase structural integrity and help prevent binding, a practical feature for repeated access. The MicroSeal gasket is specified to seal out dust, debris, and moisture, while the gloss-black finish distinguishes this version.
- Fifth-wheel clearance for coupling and towing
- 6.1-cubic-foot capacity
- Foam-filled RigidCore lid helps prevent binding
- MicroSeal gasket helps seal out dust, debris, and moisture
- Its 6.1-cubic-foot capacity is less than the Dee Zee DZ8560W’s stated extra-wide storage offering.
Skip it if you want a bright aluminum finish; the UWS EC20081 has a listed bright aluminum finish and the same RigidCore lid feature.
The EC20092 fits fifth-wheel owners who prefer a gloss-black aluminum chest with clearance for towing and a reinforced lid. Its 6.1-cubic-foot capacity sets the limit for buyers needing a larger-volume toolbox.
Full product details
| Brand | uws |
|---|---|
| Capacity | 6.1 cubic feet |
| Color | Black |
| Included Components | 5th Wheel Tool Box Gloss Black Aluminum 58" 5th Wheel Truck Tool Box (Heavy Packaging) |
| Dimensions | 57.87"L x 57.87"W x 57.87"H |
| Item Weight | 40 pounds |
| Manufacturer | UWS |
| Part Number | EC20092 |
| Manufacturer Warranty Description | Limited Lifetime Warranty (One-Year Finish; One-Year Parts) |
| Material | Aluminum |
| Material Features | Thick and Durable Aluminum |
| Model Number | EC20092 |
| Style | Updated Packaging |
| Style Name | Updated Packaging |
| Additional Information | Important information |
Listed on Amazon as: UWS EC20092 58-Inch Gloss Black Heavy-Wall Aluminum 5th Wheel Truck Bed Tool Box, RigidCore Lid
View on Amazon#4
4. UWS FWB-58
- Weight: 32.2 lb
- Capacity: 6.1 cubic feet
- Material: Aluminum
Best for: Bright-finish fifth-wheel clearance.
Why it ranks #4: Its low-profile design is specified to leave fifth-wheel towing clearance, with a 6.1-cubic-foot capacity and a 0.058-inch one-piece aluminum tub.
A low-profile shape that preserves fifth-wheel towing clearance defines the UWS FWB-58. Its 58-inch bright-aluminum chest combines a 0.058-inch, extra-thick one-piece tub with a foam-filled RigidCore lid, giving truck owners enclosed storage while accommodating trailer coupling.
The low-profile design is intended to leave plenty of clearance when towing a fifth-wheel trailer, making the box relevant to owners who keep a trailer connected or tow regularly. Its 6.1-cubic-foot capacity creates enclosed space for tools and cargo, while the 0.058-inch one-piece aluminum tub is specified for heavy tools and cargo. The RigidCore foam-filled lid is intended to maximize strength and prevent binding; independent steel locks and reinforced striker posts support secure closure and durability.
- Low-profile design provides fifth-wheel towing clearance
- 6.1-cubic-foot storage capacity
- 0.058-inch extra-thick one-piece aluminum tub
- RigidCore foam-filled lid helps prevent binding
- The listed maximum weight recommendation is 10 pounds, a narrow stated load limit.
Skip it if you require a listed maximum load above 10 pounds; this UWS model specifies a 10-pound recommendation.
This bright-aluminum UWS fits fifth-wheel owners seeking a low-profile chest, reinforced lid, and one-piece tub. Treat its stated 10-pound maximum weight recommendation as a key boundary when deciding what cargo to store.
Full product details
| Brand | uws |
|---|---|
| Capacity | 6.1 cubic feet |
| Color | Silver |
| Item Weight | 32.2 pounds |
| Manufacturer | UWS/United Welding Services |
| Part Number | FWB58 |
| Manufacturer Warranty Description | Limited Lifetime Warranty (One-Year Finish, One-Ye |
| Material | Aluminum |
| Material Features | extra-thick aluminum |
| Maximum Weight Recommendation | 10 pounds |
| Model Number | FWB58 |
| Special Features | Long Lasting |
| Special Feature | Long Lasting |
| Style | Original Packaging |
| Style Name | Original Packaging |
| Additional Information | Important information |
Listed on Amazon as: uws FWB-58 Bright Aluminum 58" 5th Wheel Truck Tool Box (LTL Shipping Only)
View on Amazon#5 · Highest Capacity
5. Dee Zee DZ8560W
- Material: Aluminum, Stainless Steel
Best for: Wide silver aluminum storage.
Why it ranks #5: This lockable aluminum fifth-wheel chest has a closed-cell foam gasket and double-V lid stiffener; its supplied listing does not state hitch clearance.
Extra-wide storage is the central draw of the Dee Zee DZ8560W Red Label chest, which uses Brite-Tread aluminum for a broad fifth-wheel toolbox format. A closed-cell foam gasket helps resist elements entering the box, while the double-V lid stiffener adds rigidity for everyday use.
The wide-storage emphasis makes this chest a fit for buyers grouping tools and gear rather than spreading them across smaller containers. Its non-rusting Brite-Tread aluminum is described as lightweight and corrosion-resistant, supporting use in a truck-bed environment. The closed-cell foam gasket helps resist weather intrusion, and the crown-style lid’s full-pan double-V stiffener adds rigidity. Dampened gas shocks and self-adjusting strikers, listed in the description, support controlled lid operation and closure.
- Extra-wide storage for more gear
- Non-rusting Brite-Tread aluminum
- Closed-cell foam gasket helps resist elements entering
- Dampened gas shocks and self-adjusting strikers
- The listed maximum weight recommendation is only 2 pounds, limiting supported load.
Skip it if you need a stated load rating above 2 pounds; this model lists a maximum weight recommendation of 2 pounds.
Pick the silver Dee Zee for buyers seeking broad tool storage, corrosion-resistant aluminum, and a gasketed lid. Its listed 2-pound maximum weight recommendation is a significant constraint for anyone planning to load heavy equipment.
Full product details
| Brand | DEE ZEE |
|---|---|
| Color | Silver |
| Included Components | Funnel |
| Manufacturer | Dee Zee |
| Part Number | DZ 8560W |
| Material | Aluminum, Stainless Steel |
| Material Features | Lightweight, durable, resistant to corrosion |
| Maximum Weight Recommendation | 2 pounds |
| Model Number | DZ 8560W |
| Special Features | Lockable |
| Special Feature | Lockable |
Listed on Amazon as: Dee Zee DZ8560W Red Label Fifth Wheel Tool Box
View on Amazon#6
6. Dee Zee DZ8560WB
- Weight: 66 lb
- Capacity: 14.9 cubic feet
- Material: Aluminum, Stainless Steel
Best for: High-volume contractor chest.
Why it ranks #6: The 72-by-26-by-25-inch utility chest offers 14.9 cubic feet and a closed-cell foam gasket, but its listing does not specify fifth-wheel clearance.
A listed 14.9 cubic feet of capacity makes the Dee Zee DZ8560WB the high-volume choice for fifth-wheel truck-bed storage. Its 72-inch chest pairs non-rusting Brite-Tread aluminum with a closed-cell foam gasket, providing room for substantial gear while helping resist weather intrusion.
The 72-by-26-by-25-inch chest and 14.9-cubic-foot capacity give buyers room to group tools and equipment in one enclosed space. Its closed-cell foam gasket helps resist the elements getting inside, while the gloss-black powder coat protects the Brite-Tread aluminum and helps prevent oxidation. A double-V pan lid stiffener adds rigidity, and stainless-steel paddle-handle latches provide a contractor-grade closing and locking point for routine access.
- 14.9-cubic-foot capacity
- 72-by-26-by-25-inch chest dimensions
- Closed-cell foam gasket helps resist weather intrusion
- Double-V lid stiffener and stainless-steel paddle-handle latches
- At 66 pounds, it is heavier than the 25-pound Tulga Fifth Wheel 44-inch polymer toolbox.
Skip it if you prioritize a lighter, shorter toolbox; the Tulga Fifth Wheel 44-inch polymer model weighs 25 pounds.
This Dee Zee suits fifth-wheel owners who need a large chest for tools and equipment and value a gasketed lid and reinforced construction. Its 72-inch length and 66-pound weight are important considerations for bed space and handling.
Full product details
| Brand | DEE ZEE |
|---|---|
| Capacity | 14.9 cubic feet |
| Color | Gloss Black |
| Included Components | Funnel |
| Dimensions | 72"L x 26"W x 25"H |
| Item Weight | 66 pounds |
| Manufacturer | Dee Zee |
| Part Number | DZ 8560WB |
| Manufacturer Warranty Description | 30 Days |
| Material | Aluminum, Stainless Steel |
| Model Number | DZ 8560WB |
Listed on Amazon as: Dee Zee DZ8560WB Red Label Fifth Wheel Utility Chest Tool Box
View on Amazon#7
7. DE ZE DZ8560W
- Capacity: 200 lb
- Material: Aluminum, Stainless Steel
Best for: Corrosion-resistant enclosed storage.
Why it ranks #7: It identifies the DZ8560W fifth-wheel tool box and lists aluminum construction, but the generic-brand listing provides less dependable product identification and fitment detail.
The DE ZE DZ8560W listing specifies a 55.5-by-22.5-by-12-inch toolbox and identifies the model by part number 8560W. Its aluminum-and-stainless-steel construction is described as lightweight, durable, and corrosion-resistant, while the lockable chest configuration groups tools and jobsite gear in enclosed storage.
The listed 55.5-inch length, 22.5-inch width, and 12-inch height give buyers concrete dimensions for planning bed storage and access. Aluminum and stainless steel are specified materials, with the listing describing the construction as lightweight, durable, and corrosion-resistant. A lockable chest format keeps tools, hardware, and truck or jobsite gear enclosed and grouped. The product information identifies part number 8560W, which gives buyers a reference when matching the specified application and configuration.
- 55.5-by-22.5-by-12-inch listed dimensions
- Aluminum and stainless-steel materials
- Construction described as corrosion-resistant
- Lockable enclosed storage for tools and gear
- The listing identifies a 200-pound capacity, a firm limit for heavier cargo.
Skip it if you expect to exceed the listed 200-pound capacity; this toolbox specifies that maximum storage load.
This listing suits buyers who need a lockable fifth-wheel toolbox with stated dimensions and corrosion-resistant materials. Its 200-pound capacity is the relevant boundary for heavier equipment, and the 8560W identifier helps with application matching.
Full product details
| Brand | Generic |
|---|---|
| Capacity | 200 pounds |
| Color | Silver |
| Included Components | Funnel |
| Dimensions | 55.5"L x 22.5"W x 12"H |
| Manufacturer | US Based Company |
| Part Number | DZ 8560W |
| Material | Aluminum, Stainless Steel |
| Material Features | Lightweight, durable, resistant to corrosion |
| Model Number | DZ 8560W |
| Special Features | Lockable |
| Recommended Uses | Tools, For storage |
| Special Feature | Lockable |
| Style | Classic |
| Style Name | Classic |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
Listed on Amazon as: DE ZE DZ8560W Red Label Fifth Wheel Tool Box
View on Amazon#8
8. Tulga 44-Inch Polymer Box
- Weight: 25 lb
- Capacity: 9.5 cubic feet
- Material: Plastic
Best for: Lightweight polymer trailer storage.
Why it ranks #8: The 44-inch, 9.5-cubic-foot polymer box is lockable and intended for trucks and trailers, but the listing does not establish fifth-wheel hitch clearance.
A 25-pound polymer body makes the Tulga Fifth Wheel 44-inch toolbox a lighter-handling option for hotshot trucks, flatbeds, and trailers. Its 44-by-20-by-18-inch format provides 9.5 cubic feet of storage, with a built-in lock and keys for enclosed tool and gear storage.
The 44-inch length and 9.5-cubic-foot capacity provide room for tools and equipment in a compact listed footprint of 44 by 20 by 18 inches. Polymer construction is specified as weather- and corrosion-resistant, supporting use in harsh environments without choosing an aluminum chest. At 25 pounds, the box is described as lightweight and easier to install and transport. A built-in locking system with keys adds a defined security feature, and mounting options cover trucks, flatbeds, hotshot trucks, and trailers.
- 9.5-cubic-foot capacity in a 44-inch toolbox
- 25-pound listed weight
- Polymer construction is weather- and corrosion-resistant
- Built-in lock and keys
- Its polymer construction is not the aluminum material used by the UWS and Dee Zee chests.
Skip it if you specifically want an aluminum toolbox; the UWS EC20081 uses extra-thick aluminum and a RigidCore lid.
Choose the Tulga for hotshot, flatbed, or trailer users who want a lockable 44-inch polymer box that is relatively light to handle. Its polymer construction is the boundary for buyers committed to metal storage.
Full product details
| Brand | Tulga Fifth Wheel |
|---|---|
| Capacity | 9.5 cubic feet |
| Color | Black |
| Included Components | Lock and keys |
| Dimensions | 44"L x 20"W x 18"H |
| Item Weight | 25 pounds |
| Manufacturer | Tulga Fifth Wheel |
| Material | Plastic |
| Model Number | TOOLBOXLARGE |
| Special Features | Lightweight, Lockable |
| Recommended Uses | Tools |
| Special Feature | Lightweight, Lockable |
Listed on Amazon as: Large Toolbox for Hotshot Truck Beds Flatbeds Trailers 44 Inc Length Heavy Duty Weather Resistant Polymer Light Weight
View on AmazonAvoiding fifth-wheel clearance and fitment mistakes
A box described as fifth-wheel compatible still needs a truck-specific measurement check before you buy. Several UWS listings say their low-profile or purpose-built design leaves room for coupling and towing, but the supplied dimensions are incomplete or inconsistent for some models. For example, the UWS EC20081 lists only 18 inches wide by 58 inches high, while the UWS FWB-58 listing does not provide a full length-width-height set.
Do not treat the shared 58-inch description as proof that either box fits your bed or clears your hitch in every position. Measure the bed width, available length, and the hitch’s movement and coupling area.
Also confirm how the box mounts and whether its lid can open without contacting the hitch or cab. The key trap is buying by nominal length alone: clearance depends on the truck, hitch, mounting location, and box dimensions together.
What a tool-box seal can—and cannot—tell you
A stated gasket helps identify a design intended to resist exposure, but it does not establish that tools will stay completely dry in every condition. The Dee Zee DZ8560W and Dee Zee DZ8560WB list closed-cell foam gaskets to help resist the elements, while UWS product information describes a MicroSeal gasket intended to keep out dust, debris, and moisture. These are useful construction details, not a supplied weatherproof rating or test result.
A lid that binds or fails to close fully can undermine the protection a gasket is meant to provide; UWS specifically says its RigidCore foam-filled lid helps prevent binding. Before loading valuable equipment, check that the box is mounted securely and the lid closes evenly against its seal.
Consider your exposure to dust and moisture, and avoid assuming that aluminum or polymer alone guarantees a sealed interior.
How to Choose a Fifth-Wheel Tool Box
Fifth-wheel clearance and dimensions
Look for an explicit fifth-wheel clearance statement, then verify the box dimensions against your bed and hitch. The UWS EC20093, UWS EC20092, and UWS FWB-58 are described as allowing fifth-wheel coupling or towing clearance; the UWS EC20081 is also marketed for that use. By contrast, the Dee Zee listings give dimensions of 72 by 26 by 25 inches for the black chest but do not state hitch clearance.
The Tulga box measures 44 by 20 by 18 inches, but its listing does not specify fifth-wheel fit. Buyers with a confirmed UWS-compatible layout can prioritize the stated clearance; anyone considering a larger chest or the polymer box should check measurements and hitch movement before ordering.
Capacity and storage needs
Choose capacity according to the gear you actually need to carry, while checking that the larger box will fit. Listed capacities range from 6.1 cubic feet for the UWS EC20093, UWS FWB-58, and UWS EC20092 to 14.9 cubic feet for the Dee Zee DZ8560WB; the Tulga 44-Inch Polymer Box lists 9.5 cubic feet. More capacity can suit contractors carrying bulky equipment, but these product facts do not show how much usable space remains after installation or how a box affects hitch access.
Buyers wanting a clearly specified fifth-wheel design may favor the 6.1-cubic-foot UWS options. Those needing more listed storage can consider the Dee Zee chest, provided its dimensions and clearance work for their truck.
Material and box weight
Compare material and listed weight when installation effort and the intended use matter. The aluminum options range from 32.2 pounds for the UWS FWB-58 to 66 pounds for the Dee Zee DZ8560WB; the UWS EC20093 weighs 47.7 pounds. The Tulga 44-Inch Polymer Box weighs 25 pounds and is described as lightweight and corrosion resistant.
These figures may help narrow a choice, but they do not establish a box’s loaded weight or how easily one person can install it. Buyers prioritizing a lower listed product weight can look at the polymer Tulga or the lighter aluminum UWS FWB-58, while those seeking an aluminum chest with much greater stated capacity may consider the 66-pound Dee Zee.
Confirm mounting and load requirements separately.
Which Fifth-Wheel Tool Box Fits Your Setup?
For a truck owner who wants a purpose-built option with stated towing clearance, choose the UWS EC20093: it combines that explicit fit-for-purpose claim with a 6.1-cubic-foot capacity and heavy-wall aluminum. If you prefer a bright aluminum finish, the UWS EC20081 is another stated fifth-wheel design; the UWS EC20092 offers a gloss-black finish, and the UWS FWB-58 is described as low profile. Need more listed storage?
The Dee Zee DZ8560W offers the highest stated capacity at 14.9 cubic feet, while the Dee Zee DZ8560WB pairs that capacity with a black finish; neither listing specifies hitch clearance. The Tulga 44-Inch Polymer Box may suit a buyer seeking a lighter trailer or truck-bed box, but its listing does not establish fifth-wheel compatibility.
Measure before ordering.
Related Buying Guides
- Best Black Tool Boxes For Trucks
- Best Tonneau Covers For Trucks With Tool Boxes
- Best Fifth Wheel Plate For Trailer
Frequently Asked Questions
How much clearance should a fifth-wheel tool box leave around the hitch and trailer pin?
Leave enough room for the hitch and trailer pin to couple and move through their expected range without contacting the box. There is no universal clearance figure: the required space depends on your truck, hitch, trailer, and box. Check their dimensions and fit guidance, including clearance during turns, before ordering.
How do I measure my truck bed and hitch before ordering a fifth-wheel box?
Measure the usable bed area and the space between the bed rails, then note the hitch and pin locations and their movement range. Compare those measurements with the box dimensions and its position when installed. Confirm that the lid can open and that the box will not interfere with coupling or towing.
Does a fifth-wheel tool box need a gasket or weather-resistant seal?
A seal can help limit water and debris entering the box, but it does not make every box fully weatherproof. Check the listing for specific sealing features: the UWS EC20093 product information names a MicroSeal gasket. For other boxes, confirm whether a gasket is included and follow the care instructions.
Does a stated storage capacity confirm fifth-wheel compatibility?
No. Capacity tells you how much storage the listing claims, not whether the box clears your hitch or trailer pin. For example, the Dee Zee DZ8560W lists 14.9 cubic feet, but the supplied information does not specify hitch clearance.
Check dimensions and confirm fit with your truck and hitch before ordering.
Can a polymer truck-bed box be used with a fifth-wheel hitch?
Do not assume compatibility from the material or general truck-bed use alone. The Tulga 44-inch polymer box is described for hotshot truck beds, flatbeds, and trailers, but its listing does not establish fifth-wheel compatibility. Verify its dimensions and hitch clearance with the seller before relying on it for towing.
Final Words
For a purpose-built box with stated fifth-wheel clearance, the UWS EC20093 is the clearest choice in this group; confirm its dimensions against your bed and hitch before ordering. Prefer a bright aluminum finish? Consider the UWS EC20081; the EC20092 offers gloss black, and the FWB-58 is described as low profile.
For more listed storage, compare the Dee Zee boxes, but do not treat capacity as proof of hitch clearance.
