Products > Truck-Boxes--Equipment > Boxes > Underbed Box > Model 631-5-02 Underbed Box, Aluminum, Compact, 5.4 cu ft > 631-5-02

Model 631-5-02 Underbed Box, Aluminum, Compact, 5.4 cu ft

631-5-02 Boxes - Weather Guard US
631-5-02 Boxes - Weather Guard US631-5-02 Boxes - Weather Guard US631-5-02 Boxes - Weather Guard US




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Model 631-5-02 Underbed Box, Aluminum, Compact, 5.4 cu ft


The rugged Underbed Storage Boxes are designed for heavy-duty trucks and semis to keep larger, heavy items and tools secure yet easily accessible. The Model 631-5-02 aluminum compact Underbed Box features a Black ARMOR-TUF® Powder Coat finish that ensures years of dependability and 5.4 cu ft of storage. The Model rotary-style two-position latch helps protect against theft and weather.


  • Fits flatbed, platform or dump truck bodies
  • Door opening 13-1/2 in high, 25-1/4 in wide
  • Aluminum door and hinge reduces box weight and protects against corrosion
  • Rain gutter and full weather seal keeps moisture out of box and your equipment
  • Stainless Steel D-Handles are easy to grip, even with gloves on, and create a tight door seal
  • Tool-less quick release doors adjust from 90 degree to 180 degree with QuickClips, no tools required
  • Heavy-duty three-point latching system means valuable supplies will be safe and protected
  • Black ARMOR-TUF® Powder Coat finish ensures years of dependability
  • Limited lifetime warranty ensures unparalleled quality


FeatureSize / Details
StyleUnderbed Box
Approx. Product Height18in
Approx. Product Length30-1/8in
Approx. Product Width18in
Approx. Cu. Ft. Per Unit5.4
ColorGloss Black
Powder Coat FinishYes
Latch MechanismLatch
Lock System3-Point Latch
Key AlikeOn Request
Weather ResistanceUltimate
Weather StripMemory Resistant D-Shaped Ribbed
WarrantyLimited Lifetime
Weather SealYes

Package Contents

Part NumberQtyDescription



Additional Underbed Box Models

Model No.Approx. Product HeightApprox. Product LengthApprox. Product WidthApprox. Cu. Ft. Per UnitMaterialColorBuy Online
524-5-0218-1/8in24-1/8in18-1/4in4.5SteelGloss Black
525-5-0214-1/8in24-1/8in12-3/8in2.3SteelGloss Black
530-5-0218-1/4in30-1/8in18-1/8in5.6SteelGloss Black
536-5-0218-1/8in36-5/8in18-1/4in6.2SteelGloss Black
538-5-0224-1/8in36-5/8in24-1/4in12.1SteelGloss Black
548-5-0218-1/8in48-1/8in18-1/4in9.1SteelGloss Black
550-5-0224-1/8in48-1/8in24-1/4in16.2SteelGloss Black
560-5-0218-1/8in60-1/8in18-1/4in11.2SteelGloss Black
562-5-0224-1/8in60-1/8in24-1/4in20.0SteelGloss Black
622-5-0214in24-1/8in12-1/4in2.4AluminumGloss Black
631-5-0218in30-1/8in18in5.4AluminumGloss Black
636-5-0218in36-5/8in18in6.5AluminumGloss Black
660-5-0218in60-1/8in18in11.2AluminumGloss Black
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What replacement lock do I use for 636-0-02 underbelly box with "D" handle

Asked by: Russell welding
Please contact Customer Care at 888-523-3371 Monday through Friday from 8:00 AM to 5:00 PM EST. Please provide the key code that is found on your lock cylinder. The replacement part number will be determine with the key code.
Answered by: Customercare
Date published: 2018-09-19

Will this model work on the side of an F250 if bolted through a ladder rack

Asked by: Skip13
Product Model 560-3-02 cannot bolt through the ladder rack, it will cause cracks in the box. Please go to the following link, to see how it is to be installed.
Answered by: Customercare
Date published: 2018-09-11

Is it possible to buy just the door from this box?

Asked by: RayC
Product Model 660-5-02 replacement door is part number is 70246-5-02. Please go to the following link and input your city name or zip code, to find a distributor near you that can order the door.
Answered by: Customercare
Date published: 2018-09-10

is this availible in a side swing door

Asked by: Walter
We don't offer a swing door.
Answered by: Customercare
Date published: 2018-08-13

I bought 2 new boxes (model #550-5-02) I had 2 old boxes on the truck already for a total of 4 boxes, the new boxes came with DUO locks they say M201 on them, I wanted the 2 old boxes that were previously on the truck to have these new locks on them.

Asked by: JLBshimba
If your old boxes have key code RHXX, then you can't order the new locks with an M code. If the old boxes have an M code, you can order part number 70168-201. That will give you a new lock and keys keyed to M201.
Answered by: Customercare
Date published: 2018-08-01

How do I get replacement chains for model# 627-0-02?

Asked by: Chains
The replacement chains part number is 7638.
Answered by: Customercare
Date published: 2018-07-20
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