18 Inch Underbody Truck Tool Boxes
18 inch underbody truck tool boxes from Buyers Products, sold by a Buyers dealer in Winnipeg that ships across Canada. Nearly everything here is an 18x18 inch smooth aluminum underbody box, in plain, black or white finish, in lengths of 24, 36, 48 and 60 inches, with a single or double barn door closed by a 3-point compression latch or cam lock hardware. The universal shelf kits for the 36, 48 and 60 inch boxes and the welded aluminum mounting brackets for the 18x18 series are listed alongside.
The page also holds the 18x16 inch topsider boxes in 88 and 96 inch lengths and the 18x20x71 inch diamond tread crossover box. Every title reads height by depth by length in inches.
18x18 underbody boxes with barn doors, in one place
Buyers Products makes underbody boxes in several heights, and 18 inches is the size that fits under most flatbed and service body decks without dragging on a curb. This collection pulls every 18 inch box out of the Buyers truck tool boxes range so you can compare lengths, finishes and door hardware side by side. The smooth aluminum barn door series is the bulk of it: 18x18x24 single door, and 18x18x36, 18x18x48 and 18x18x60 double barn door, in plain, black or white.
It is a sub-collection of the Buyers Products catalogue. Other brands' underbody boxes are in Weather Guard and Dee Zee.
Shop 18 inch tool boxes by type
Smooth aluminum barn door underbody boxes
Barn doors swing out from the centre, so a box under a low deck opens fully where a drop door would hit the ground. The series is offered in 24 inch (single door) and 36, 48 and 60 inch (double door) lengths, and one version has stainless steel doors.
3-point compression latch or cam lock rod
Each length is listed with one of two closures. The 3-point compression latch pulls the door tight at three points and is the choice for a box that rides behind a rear tire in spray. The cam lock rod version uses a rotating rod with cam lock hardware, simpler and easier to service in the field.
18 inch topsider boxes
Topsider boxes run along the bed rail. The 18x16 inch Buyers topsiders come in 88 and 96 inch lengths, in plain aluminum with flip-up doors or gloss black with drop doors, and in matte black and gloss black diamond tread.
18x20x71 crossover box
The single crossover in the collection is the 18x20x71 inch diamond tread aluminum box in gloss white or textured matte black, sized to span the bed rails of a full-size pickup.
Shelf kits and mounting brackets
Universal shelf kits are listed for the 18x18x36, 48 and 60 boxes and add a shelf so small parts stop living under the big ones. The 18x18 inch welded aluminum brackets hang the box from a deck or frame; steel brackets are in the parent collection.
Common applications
Flatbed and service body builders fit a pair of 18x18x36 or 18x18x48 boxes below the deck, one per side, with shelf kits to split straps from hand tools. Deck-over trailer owners bolt a single 18x18x24 under the tongue for chains and binders. Pickup owners who need length pick the 96 inch topsider or the 18x20x71 crossover.
Why buy 18 inch Buyers tool boxes here
- Every 18 inch box on one page. The collection rule isolates the 18x boxes so lengths and finishes compare directly.
- Latch stated in the title. 3-point compression latch or cam lock hardware, single or double barn door, all named before you open the page.
- Matching shelf kits. Kits are listed by the exact box length they fit (36, 48 or 60 inch).
- Ships across Canada from Winnipeg in Canadian dollars; boxes ship freight.
Choosing the right 18 inch tool box
Measure the clear length between crossmembers under the deck, then the drop from the deck to your minimum ground clearance; an 18 inch box needs 18 inches plus the bracket. Pick the 3-point compression latch behind a rear tire and the cam lock rod where the box is sheltered. Add the shelf kit for the length you choose, and the welded aluminum brackets for an aluminum deck. If you are not sure what fits, contact us with your year, make, model and configuration.
Common questions
What does 18x18x36 mean?
Height, depth and length in inches: 18 inches tall, 18 inches deep and 36 inches long. Measure the space under your deck in the same order.
Single or double barn door?
The 24 inch box has a single door; the 36, 48 and 60 inch boxes have double barn doors that meet in the centre, so each door swings less than half the box length.
Do the shelf kits fit any 18x18 box?
The universal shelf kits are listed for the 18x18x36, 18x18x48 and 18x18x60 boxes; order the kit that matches your box length.
Will an 18 inch underbody box fit under my flatbed?
Measure from the underside of the deck to the ground, subtract the ground clearance you need, and the result must exceed 18 inches plus the bracket. If it does not, a 15 or 16 inch box from the parent collection is the alternative.