aluminum tank industries|SKU:AUX30CBR-var-55774-4f1556

ATI Rectangular Auxiliary Tank Toolbox Combo — Diamond Plate Aluminum Diesel and Tool Storage

Diesel Auxiliary Tank and Toolbox in One Unit

Four capacity sizes — 30, 42, 58, or 62 gallon options
Fully welded baffles — Reduces fuel slosh and adds structural strength
Diamond plate aluminum — Lightweight, heavy-gauge construction resists corrosion
Secure integrated toolbox — Locked storage with stainless locking handles
Rollover-protected vent system — Safety-rated venting for mobile fuel storage
  • Free Shipping -- LTL freight delivery to your site at no extra cost
  • Free Pre-offer Spec Review -- We verify bed fitment and capacity for your truck before you order

Price range: $1,129.00 through $1,249.00

30-day money back · No restocking fee

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Ships in 3–5 Days Heavy-duty crating included.
4.9/5 Stars 2,400+ verified reviews.

In the box

  • ATI Auxiliary Tank Toolbox Combo unit
  • 3/8″ NPT outlet fitting
  • Rollover-protected vent assembly
  • Automotive-style fuel cap
ATI Rectangular Auxiliary Tank Toolbox Combo
ATI Rectangular Auxiliary Tank Toolbox Combo — Diamond Plate Aluminum Diesel and Tool Storage
$1,129.00 – $1,249.00Price range: $1,129.00 through $1,249.00

Diesel Auxiliary Tank and Toolbox in One Unit

The ATI Rectangular Auxiliary Tank Toolbox Combo gives you on-site diesel storage and secure tool storage in a single, field-proven unit. Built-to-spec from lightweight aluminum with fully welded baffles to reduce fuel slosh and add structural strength. Every unit ships standard with a 3/8″ NPT outlet, vent with rollover protection, and an automotive-style fuel cap. Choose from 30, 42, 58, or 62-gallon capacities to match your truck bed and range requirements. Ships free. Pay as low as $38/month with Affirm.

FREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORT
4 Capacity Options
Integrated Toolbox
Rollover Vent Protection
Ships Free
30–62 Gal
Available Capacities
4 Sizes
Tank Configurations
$1,129
Starting Price
Verified Before It Ships — Or We Don't Ship It

Verified Before It Ships — Or We Don't Ship It

Ordering the wrong auxiliary tank means wasted bed space, incompatible pump fittings, and a return freight claim that costs you weeks. Tank Vault eliminates that risk with our pre-offer spec review process. Before your ATI toolbox combo ships, we cross-reference your truck bed dimensions, fuel transfer setup, and capacity requirements against the tank's exact measurements. The 30-gallon unit fits 48.5 inches of bed length; the 62-gallon requires 60 inches. We make sure you order the right size the first time — with the correct 3/8″ NPT outlet for your Fuel Shotz transfer kit. No guessing. No return freight delays.

Diamond Plate Aluminum That Handles Real Work

Diamond Plate Aluminum That Handles Real Work

This isn't a thin-walled aftermarket box. The ATI toolbox combo is built from rugged diamond plate aluminum with a fully welded baffle system that reduces fuel slosh under acceleration and braking — and adds structural rigidity to the tank body. Every seam is welded, not riveted. The toolbox section features a polished aluminum diamond plate body with industrial-grade stainless locking handles that hold up to daily use on job sites. Available in black or white powder coat finish to match your truck or fleet livery. Lightweight enough for practical bed installation, heavy-gauge enough to survive years of exposure to diesel fuel, road debris, and weather.

Diesel Transfer and Tool Storage in One Install

Diesel Transfer and Tool Storage in One Install

Run diesel from the auxiliary tank directly to your truck's main fuel tank using ATI's Fuel Shotz transfer kit — sold separately and spec'd to match the 3/8″ NPT outlet on every unit. The integrated toolbox section gives you a locked compartment for tools, fittings, and job-site essentials without sacrificing fuel capacity. Toolbox dimensions vary by tank size: the 30-gallon model provides 42 inches of storage length, while the 58 and 62-gallon models extend to 52 inches. All tanks include a vent with rollover protection and an automotive-style fuel cap. One mounting, one bed space, two functions — that's the point of a combo unit.

Verify Fitment Before You Order

Confirm your truck bed dimensions against the tank and toolbox measurements listed in the specifications below.

  • Minimum 19 inches of bed width for 30 and 42 gallon tanks
  • Minimum 21 inches of bed width for 58 and 62 gallon tanks
  • Minimum 60 inches of bed length required for the 62 gallon tank

Built for Real Work

Designed for fleet operations, field service, and long-haul diesel trucks that need extra range and secure tool storage.

Long-Haul Diesel Trucks
Construction Fleet Vehicles
Agricultural Operations
Field Service Trucks

Full specifications

At a glance

Warranty
See product page
Full specifications17 data points across 4 categories

Dimensions

30 Gallon Tank48.5 inches long x 19 inches wide x 18 inches high
42 Gallon Tank48.5 inches long by 19 inches wide by 21 inches high
58 Gallon Tank58 inches long by 21 inches wide by 19 inches high
62 Gallon Tank60 inches long by 21 inches wide by 19 inches high
30 Gallon Toolbox42 inches long x 19 inches wide x 9 inches high
42 Gallon Toolbox42 inches long x 19 inches wide x 9 inches high
58 Gallon Toolbox52 inches long x 19 inches wide x 9 inches high
62 Gallon Toolbox52 inches long x 19 inches wide x 9 inches high

Power & Performance

Outlet3/8″ NPT
Fuel TransferOptional ATI Fuel Shotz diesel kit
BafflesFully welded to reduce slosh and add strength

Materials

Tank ConstructionLightweight aluminum
Toolbox BodyAll polished aluminum DP body construction
Toolbox HandlesPolished industrial stainless locking handles

Compliance & Warranty

VentVent with rollover protection
Fuel CapAutomotive style
WarrantySee product page

The Tank Vault Promise

Every product we carry is vetted for build quality and real-world performance. If it doesn't meet our standards, it doesn't make the cut.

Free Freight DeliveryLTL delivery to your site at no charge. Call for liftgate or job-site delivery options.
Documentation IncludedAll standard product specs and information provided with your order — no chasing the manufacturer.
30-Day Hassle-Free ReturnsUninstalled, original packaging — contact us immediately if delivery damage. We resolve it with no runaround.
★★★★★
“Bought the 58-gallon for my F-350. Tank Vault confirmed the bed fit before I ordered — 58 inches cleared my toolbox rail by an inch. Diamond plate finish looks solid, toolbox locks tight, and the baffles make a real difference on rough job site roads. No slosh, no issues. Shipped free and arrived when they said it would.”
D
Derek L.Fort Worth, TX

Aluminum Tank Industries Rectangle diesel Auxiliary Tank Toolbox combos offer a lightweight aluminum design with sizes that range from 30 gallons to 65 gallons.

Transfer diesel fuel directly from the tank to your truck’s diesel fuel tank using ATI’s Fuel Shotz diesel kit (available as an optional product add on). 

ATI Rectangle Auxiliary Tank Toolbox Combo Dimensions:

  • 30 gallon – 48.5 inches long x 19 inches wide x 18 inches high
  • 42 gallon – 48.5 inches long by 19 inches wide by 21 inches high
  • 58 gallon – 58 inches long by 21 inches wide by 19 inches high
  • 62 gallon – 60 inches long by 21 inches wide by 19 inches high

Toolbox Dimensions:

  • 30 gallon – 42 inches long x 19 inches wide x 9 inches high
  • 42 gallon – 42 inches long x 19 inches wide x 9 inches high
  • 58 gallon – 52 inches long x 19 inches wide x 9 inches high
  • 62 gallon – 52 inches long x 19 inches wide x 9 inches high

The toolbox features:

  • All polished aluminum DP body construction 
  • Polished industrial stainless locking handles
  • Automotive style gas shocks for lid
  • Extreme 3 layer lid design
  • Full aluminum piano hinge
  • Aero-beveled lid design

All ATI auxiliary tank toolbox combos come standard with a 3/8″npt outlet, vent with rollover protection, automotive style fuel cap and fully welded baffles to reduce slosh and add strength.

These tanks are constructed from rugged diamond plate aluminum and are all available with a black or white powder coated finish.

Whether you are a farmer, contractor, municipality, or simply a private citizen, you can trust that your ATI tank will hold up and last a lifetime. 

    All ATI auxiliary tanks come standard with the following:

    • Meets DOT requirements for diesel auxiliary.
    • Aluminum tank construction.
    • Quick and easy installation.
    • Tanks are baffled to reduce movement of contents.
    • No wires or switches to install.
    • Rollover protection.
    • Automotive style fill cap.
    • Hold down brackets.
    • Pressure and leak detection test.
    • Clean and free of debris inside and outside of the tank.
    • 1 year limited warranty.

    Other Tank Options:

    Additional information

    Size

    30 Gallon, 42 Gallon, 58 Gallon, 62 Gallon

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    Frequently Asked Questions

    The ATI auxiliary tank transfers diesel to your truck's main fuel tank via the 3/8″ NPT outlet using ATI's Fuel Shotz diesel kit, sold separately. This is a gravity-fed or pump-assisted transfer system — it does not connect directly to your OEM fuel line. Contact Tank Vault before ordering and we'll verify compatibility with your specific truck and transfer setup.
    Measure your available bed length between the cab and tailgate. The 30 and 42-gallon models are 48.5 inches long; the 58-gallon is 58 inches; the 62-gallon is 60 inches. Width is 19 inches for the 30/42-gallon and 21 inches for the 58/62-gallon. Tank Vault provides a free pre-offer spec review — send us your truck model and bed measurements and we'll confirm the correct fit before you order.
    ATI auxiliary tanks are designed for diesel fuel transfer in mobile applications. However, specific DOT compliance depends on your jurisdiction and how the tank is installed. Some states require additional components like anti-siphon valves for gravity-fed systems. Tank Vault does not make compliance claims beyond what the manufacturer provides. Contact us with your state and application details, and we'll help you determine what's required for legal highway operation.
    Ships free via LTL freight to your location. Auxiliary tank combos are oversized items and require freight delivery — they do not ship via parcel carriers. Transit times vary by destination. If you need liftgate service or delivery to a residential address, contact Tank Vault before ordering to confirm logistics. We coordinate freight directly so you're not dealing with carrier surprises on delivery day.
    Yes. Every ATI toolbox combo includes polished industrial stainless locking handles. The toolbox section is a fully enclosed compartment with a secure latch mechanism — not a simple clip or strap. It's designed to keep tools, fittings, and supplies locked in the bed of your truck at job sites and during transit.
    That's exactly why Tank Vault offers a free pre-offer spec review. Send us your truck model, bed dimensions, and capacity needs before ordering, and we'll confirm the correct tank size. If a unit arrives and doesn't fit, our 30-day return policy applies for uninstalled tanks in original packaging. But our goal is to make sure you never need it — we catch sizing mismatches before the order ships.
    No. The Fuel Shotz diesel transfer kit is an optional add-on sold separately. The tank ships with a standard 3/8″ NPT outlet, rollover-protected vent, and automotive-style fuel cap. You'll need the transfer kit to move diesel from the auxiliary tank to your truck's main tank. Contact Tank Vault to add the Fuel Shotz kit to your order — we'll make sure it's spec'd to your setup.
    SKU: AUX30CBR Categories: , , Brand:

    The Tank Vault Promise

    Every product we carry is vetted for build quality and real-world performance. If it doesn't meet our standards, it doesn't make the cut.

    Free Freight Delivery LTL delivery to your site at no charge. Call for liftgate or job-site delivery options.
    Documentation Included All standard product specs and information provided with your order — no chasing the manufacturer.
    30-Day Hassle-Free Returns Uninstalled, original packaging — contact us immediately if delivery damage. We resolve it with no runaround.

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    About aluminum tank industries Fuel Tank Toolbox Combos

    aluminum tank industries is a trusted manufacturer of premium fuel tank toolbox combos. TankVault is an authorized dealer offering the full aluminum tank industries lineup with free delivery, price match guarantee, and expert support.

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