ATB A-FS51 Aluminum Trailer A-Frame Cargo Tool Box, Side Doors Both Ends, DT-Handle Locks
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Features
- .125 Aluminum Sheet: ATB builds the A-FS51 A-frame cargo box from .125 aluminum sheet with a smooth finish and rates it super heavy duty.
- Doors on Both Ends: A single side-open door on each end lets you reach in from either side of the trailer tongue.
- DT-Handle Locks: Stainless steel Dolphin Tail DT-handle locks resist tampering; ATB calls the box water-tight and theft resistant.
- Adjustable Shelves: Heavy duty shelves adjust to the gear you carry.
- Commercial Weather Seal: A commercial weather seal keeps the box dry.
- M3300F Kit Included: ATB includes the M3300F mounting kit, and the angled sides follow the A-frame.
Description & Fitment
The ATB A-FS51 is a .125 aluminum cargo box for the A-frame of a cargo, horse or utility trailer, sized for hitching tools and tie-down gear. A single side-open door on each end gives access from either side, with stainless Dolphin Tail DT-handle locks. Inside are adjustable heavy duty shelves, and a commercial weather seal keeps it dry. Four sizes run from 24" to 62" tall in smooth aluminum, with the M3300F kit included and built in the USA.
Fitment & Compatibility
How to choose: measure the open A-frame space for width and depth, then pick a height that clears whatever sits in front of the trailer. Sizes run 24"H x 16"D x 35"W up to 62"H x 44"D x 74"W.
Leave room on both sides for the end doors to open.
The M3300F mounting kit is included.
Fits: Cargo, horse and utility trailer A-frame tongues (check the size table against your tongue)
About 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 fits trailers with an A-frame tongue. Compare the width and depth in the table with the open space on your tongue.
What trailers is it for?
ATB designs it for the A-frame of a cargo, horse or utility trailer.
What can I store in it?
ATB suggests hitching gear: hitch balls, wood blocks, safety chains, light connectors, jacks, wrenches, crowbars and tie-down gear.
How do I measure my tongue?
Measure the open A-frame space ahead of the coupler for width and depth, and check the height against what is in front of the trailer.
Is a mounting kit included?
Yes. ATB includes the M3300F mounting kit.
Will it stay dry?
ATB fits a commercial weather seal to keep the box dry.
Installation
- 5/16" nut setter tip
- Tape measure
- Drill
- 1/4" drill bit
Here's the short version. Follow ATB's install sheet (below) for your truck's exact positions and hardware.
- Check all parts against the parts list and make sure there is room to mount the box.
- Set the box on the trailer A-frame to confirm the fit. The box is not predrilled.
- Outline both frame rails on the box bottom, remove the box and turn it upside down on a pad.
- Draw a center line between each pair of outline marks and mark three holes per side, one centered and two as far to the outside edges as possible; drill all six with a 1/4" bit.
- Apply a 3" rubber strip along each center line for the full box length.
- Set the box back on the A-frame and drive the six self-drilling screws with washers using a drill and nut setter.
Stuck on a step?
- A-FS51 A-frame cargo box
- M3300F mounting kit
Specifications
| Brand | ATB |
|---|---|
| Series | A-FS51 |
| Type | Trailer A-frame cargo box |
| Material | .125 aluminum sheet |
| Finish | All smooth aluminum |
| Doors | Single side-open door on both ends |
| Lock | Stainless steel DT-handle locks |
| Shelves | Adjustable heavy duty shelves |
| Weather protection | Commercial weather seal |
| Mounting | M3300F mounting kit included |
| Made in | USA |
| Part number | A-FS51-241635-S |
| Part # | Size |
|---|---|
| A-FS51-241635-S | 24"H x 16"D x 35"W |
| A-FS51-362442-S | 36"H x 24"D x 42"W |
| A-FS51-483248-S | 48"H x 32"D x 48"W |
| A-FS51-624474-S | 62"H x 44"D x 74"W |
Warranty, shipping & returns
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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.
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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.
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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.
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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.