ATB M2600UD aluminum under-deck heavy duty mounting kit, exploded view

ATB M2600UD Under-Deck Mounting Kit, Adjustable 1/4" Aluminum Hangers

$252.00
Freight shippingCalculated at checkout Only 5 leftIn stock now  Estimated delivery
Box size
Hangers
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  • 30-Day Money-Back GuaranteeReturn it within 30 days of delivery for a refund
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Features

  • 1/4" Aluminum Brackets: The brackets are .25 (1/4 gauge) aluminum, engineered by ATB for crossover underbody cargo boxes.
  • Adjustable Hangers: Predrilled, adjustable holes let the hanger brackets match the box height and keep the load tight to the deck.
  • Under-Deck Mount: The kit mounts to the box and to the cross beams under a flat deck or van trailer.
  • 1 or 2 Hanger Kits: Each size comes as a 1-hanger kit rated 250 lbs. max or a 2-hanger kit rated 350 lbs. max.
  • Grade 8 Hardware: ATB's install sheet lists 1/2" rod bolts with Grade 8 nuts, nylon lock nuts, flat washers and bolts.
  • Unpainted Aluminum: The kit is bare aluminum with no painted finish.

Description & Fitment

The ATB M2600UD hangs a crossover underbody cargo box below a flat deck or van trailer. Adjustable .25 (1/4 gauge) aluminum hanger brackets clamp to the cross beams and carry the box, keeping it tight to the deck and clear of the road. Each size comes with 1 hanger (250 lbs. max) or 2 hangers (350 lbs. max).

Fitment & Compatibility

How to choose: match the box height and width (the part number reads height then width, e.g. 2436 = 24"H x 36"W), then pick 1 hanger (250 lbs. max) or 2 hanger (350 lbs. max) by the loaded weight.

ATB sets the outside brackets as far out on the trailer as possible with one in the center. For non-adjustable brackets, ATB offers the M2650UD series.

Fits: Crossover underbody cargo boxes under a flat deck or van trailer (match box height and width)

About ATB

ATB

American Truckboxes (ATB) builds aluminum and steel truck boxes, tanks and storage in Blanchard, North Dakota, and has done so for more than 25 years, by its own account. Its range covers pickup crossover, side-mount, chest and drawer boxes, service-truck boxes and packs, fuel tanks, and heavy-truck and trailer boxes.

Authorized ATB dealer. Prestige Truck is an authorized ATB dealer: every box on this page is built by ATB to the part number shown.

Frequently Asked Questions

Will it fit my trailer?

It mounts to the cross beams under a flat deck or van trailer. Check the box height and width and the space under the deck.

Is the kit painted?

No. It is bare aluminum with no painted finish.

Is there a non-adjustable version?

ATB points to its M2650UD series for non-adjustable brackets.

How do I pick the size?

Match the kit to your box: the part number gives box height then width (2436 = 24"H x 36"W). Choose 1 hanger (250 lbs. max) or 2 hanger (350 lbs. max) by load.

How does it ship?

By freight from the ATB factory in Blanchard, ND, with lift-gate delivery available. For Alaska, Hawaii or Canada, contact us for a freight quote before you order.

What should I check when it arrives?

Check it before the driver leaves: look it over for dents, scratches or shipping damage, note any damage on the delivery receipt and send us photos.

Installation

Install time About 1.5 to 4 hours
What's involvedRod bolts and clamp brackets hang from the trailer cross beamsthe box is blocked in place and clamped between top and bottom brackets.
Tools
  • 3/4" ratchet wrench
  • 3/4" wrench
  • Tape measure
  • Drill with 1/2" bit
  • Two clamps
  • Blocks

Here's the short version. Follow ATB's install sheet (below) for your truck's exact positions and hardware.

  1. Check all parts against the parts list and make sure there is room to mount the box.
  2. Move the cargo box to its underbody position to check it fits there.
  3. Move the box aside. Put a washer and locknut on each rod and tighten until the thread shows 1/4" past the nut. Slide each rod through a top bracket and fit the top clamp bracket between the trailer I-beams. Do this for all brackets before going on.
  4. Set the outside brackets as far out on the trailer as possible and one in the center (ATB: three bracket sets for 750 lbs., five for 1250 lbs.).
  5. Fit the top bracket and top center clamp, insert the bolt with a washer on both ends and secure it with a nylon lock nut, then secure the nut on the rod.
  6. Move the box into position and block it in place.

Stuck on a step? Ask our install experts

What's included
  • M2600UD aluminum top and bottom box brackets and I-beam clamp brackets
  • Rod bolts, Grade 8 nuts, nylon lock nuts, flat washers and bolts

Specifications

BrandATB
SeriesM2600UD
TypeUnder-deck adjustable mounting kit
Material.25 (1/4 gauge) aluminum
FinishUnpainted aluminum
Made inUSA
Part numberM2600UD-2424-1S
Versions
Part # Box size Hangers Model Weight Load rating
M2600UD-2424-1S 24"H x 24"W 1 hanger M2600UD-2424-1S 16 lbs. 250 lbs. max
M2600UD-2424-2S 24"H x 24"W 2 hanger M2600UD-2424-2S 32 lbs. 350 lbs. max
M2600UD-2430-1S 24"H x 30"W 1 hanger M2600UD-2430-1S 21 lbs. 250 lbs. max
M2600UD-2430-2S 24"H x 30"W 2 hanger M2600UD-2430-2S 42 lbs. 350 lbs. max
M2600UD-2436-1S 24"H x 36"W 1 hanger M2600UD-2436-1S 24 lbs. 250 lbs. max
M2600UD-2436-2S 24"H x 36"W 2 hanger M2600UD-2436-2S 48 lbs. 350 lbs. max
M2600UD-2448-1S 24"H x 48"W 1 hanger M2600UD-2448-1S 34 lbs. 250 lbs. max
M2600UD-2448-2S 24"H x 48"W 2 hanger M2600UD-2448-2S 68 lbs. 350 lbs. max

Warranty, shipping & returns

  • Warranty

    ATB covers its standard truck boxes with a 60-month (5-year) limited warranty for the original purchaser; it is not transferable.
    • For a warranty claim, contact us with your order number and photos and we will work it through with ATB.

  • Shipping

    Ships by freight from the ATB factory in Blanchard, ND; lift-gate delivery available.
    • Alaska, Hawaii and Canada: contact us for a freight quote before you order.
    • We email your tracking details as soon as it ships.

  • Inspect on delivery

    Check the box when the freight arrives, before the driver leaves: look over the lids, doors, corners and welds for dents, scratches or shipping damage. Note any damage on the delivery receipt and send us photos. Check it as soon as it arrives.
    • Look for crushed ends, punctures or tears in the carton.
    • If something looks wrong, take photos of the box and the parts (and if a driver asks you to sign, note the damage on the receipt).
    • Open the box and check the parts against the parts list before you install.
    • Email support@prestigetruck.com right away with your order number, a short note and photos. We send a replacement or a full refund at no cost to you.

  • 30-day returns

    Return it within 30 days of delivery, unused, in the original packaging, with proof of purchase.
    • Email support@prestigetruck.com with your order number. We reply within 1-2 business days with instructions.
    • Damaged, defective or wrong item: we send a prepaid label or arrange a pickup.
    • Changed your mind: you pay return shipping. No restocking fee.
    • Refunds go back to your original payment method within 7 business days of approval. See our returns policy.
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