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Deck Plates & Air Line Boxes

Looking for Semi-Truck Deck Plates Air Line Boxes? Explore our range of durable aluminum and steel deck plates with integrated airline boxes. Keep your airlines organized and protected on the road. Upgrade your truck's functionality with our convenient and customizable options at 4 State Trucks!
  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • Merritt 444 Deck Plate Mounting Hardware

    Merritt 444 Deck Plate Mounting Hardware

    MERRITT

    $38.07
    Mounting Hardware For Merritt 444 Deck Plate* High Quality Deck Plate Mounting Hardware* To Use With Merritt Deck Plate Number 444* Deck Plate Not Included* Hardware For 1 Deck Plate* Sold...
    440
    SKU:
    440
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    $38.07
    Qty in Cart: 0
    Price:
    $38.07
    Subtotal:
  • Dyna-Deck Top Mount Modular Deck Cover, 56 L X 33.25 W IN

    Dyna-Deck Top Mount Modular Deck Cover, 56 L X 33.25 W IN

    MERRITT

    $541.99
    56 L X 33.25 W Inch Deck Plate W/ Slide Together Planks* High Quality Deck Plate* Dimensions:   - 56 Length   - 33.25 Width* With Top Mount With Easy Slide Together Planks* Has Non Skid Ribbed Deck...
    436
    SKU:
    436
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Length Options:
    56 Inch
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $541.99
    Qty in Cart: 0
    Price:
    $541.99
    Subtotal:
  • Merritt Diamond Plate Aluminum Air Line Box W/ 2 Oval Light Holes

    Merritt Diamond Plate Aluminum Air Line Box W/ 2 Oval Light Holes

    MERRITT

    $423.99
    Air Line Connection BoxThis Merritt 31.58 X 9.36 X 9 inch diamond plated aluminum alloy air line connection box has two oval light holes. This air line connection box weighs 18 pounds and includes...
    3534
    SKU:
    3534
    Truck Class:
    Heavy Duty
    Length Options:
    31 Inch
    Material Options:
    Aluminum
    Finish Options:
    Diamond Plate
    Style Options:
    Surface Mount
    Product Type:
    Cargo Control
    $423.99
    Qty in Cart: 0
    Price:
    $423.99
    Subtotal:
  • Recessed Air Line Box Stainless Steel W/ Holes For Electric & 2 Air Hook Ups

    Recessed Air Line Box Stainless Steel W/ Holes For Electric & 2 Air Hook Ups

    IOWA CUSTOMS

    $608.99
    Air Line Box* High Quality Recessed Air Line Box* Made Of Stainless Steel * With Openings for 1 Electric And 2 Air Hook Up* Sold Individually* Warranty On Recessed Air Line Box Against Defects In...
    09-0504318
    SKU:
    09-0504318
    Truck Class:
    Universal
    Make:
    Universal Items
    Material Options:
    Stainless Steel
    Style Options:
    Flush Mount
    Product Type:
    Frame & Chassis
    $608.99
    Qty in Cart: 0
    Price:
    $608.99
    Subtotal:
  • FREE SHIPPING
    Trough Style Air Line Box Stainless Steel By Brunner

    Trough Style Air Line Box Stainless Steel By Brunner

    BRUNNER FABRICATION

    $618.99
    20.25 X 15 Inch Trough Style Air Line Box By Brunner FabricationProtect the air line connection on your truck with this high quality trough style airline box by Brunners Fabrication Inc. It is made...
    09-0504310
    SKU:
    09-0504310
    Length Options:
    20 Inch
    Truck Class:
    Universal
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Style Options:
    Surface Mount
    Product Type:
    Air, Electrical, & Safety
    $618.99
    Qty in Cart: 0
    Price:
    $618.99
    Subtotal:
  • Stainless Steel Airline Box W/ 2 Electric Plug Holes & Bolted In Ends

    Stainless Steel Airline Box W/ 2 Electric Plug Holes & Bolted In Ends

    PHOENIX DESIGN

    $291.99
    SS Air Line Box W/ 2 Electric Plug Holes & Bolted In EndsThis air-line box uses strong 304 stainless steel to keep your electrical connections safe. It includes two handy electrical plug holes with...
    09-0504308
    SKU:
    09-0504308
    Truck Class:
    Universal
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $291.99
    Qty in Cart: 0
    Price:
    $291.99
    Subtotal:
  • Air Line Box Stainless Steel 32 Inch W/ Hole For Single Electric Plug- Bolted In Ends

    Air Line Box Stainless Steel 32 Inch W/ Hole For Single Electric Plug- Bolted In Ends

    PHOENIX DESIGN

    $277.99
    Airline Box W/ Single Electric PlugCrafted from stainless steel, the Air Line Box incorporates two cutouts for air lines. For increased durability and security, its ends are bolted. The overall...
    09-0504307
    SKU:
    09-0504307
    Truck Class:
    Universal
    Length Options:
    32 Inch
    Style Options:
    Surface Mount
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $277.99
    Qty in Cart: 0
    Price:
    $277.99
    Subtotal:
  • FREE SHIPPING
    Air Line Box Diamond Plate Aluminum W/ Single Electrical Plug Hole by CSM

    Air Line Box Diamond Plate Aluminum W/ Single Electrical Plug Hole by CSM

    CHROME SHOP MAFIA

    $454.99
    Aluminum Air Line Box w/ Single Electrical Plug Hole By Chrome Shop MafiaHide unsightly connectors on the back of your truck with this CSM Air Line Box. Made of lightweight aluminum with diamond...
    09-0504200
    SKU:
    09-0504200
    Truck Class:
    Universal
    Location:
    Made In USA
    Material Options:
    Aluminum
    Make:
    Universal Items
    Finish Options:
    Diamond Plate
    Style Options:
    Surface Mount
    Product Type:
    Frame & Chassis
    $454.99
    Qty in Cart: 0
    Price:
    $454.99
    Subtotal:
  • Smooth Aluminum Recessed Air Line Box With Holes For 7-Way Plug, Air Lines

    Smooth Aluminum Recessed Air Line Box With Holes For 7-Way Plug, Air Lines

    IOWA CUSTOMS

    $590.99
    Smooth Aluminum Recessed Air Line BoxThis quality Series 7 Iowa Customs recessed air line box fits most trucks. It is made of lightweight smooth aluminum and has pre-cut openings for trailer air...
    09-0504103
    SKU:
    09-0504103
    Truck Class:
    Universal
    Finish Options:
    Smooth
    Make:
    Universal Items
    Style Options:
    Flush Mount
    Material Options:
    Aluminum
    Product Type:
    Frame & Chassis
    $590.99
    Qty in Cart: 0
    Price:
    $590.99
    Subtotal:
  • Smooth Aluminum Air Line Box W/ 45 Degree Front, Flange, Trailer Air, 7-Way Hook-Up

    Smooth Aluminum Air Line Box W/ 45 Degree Front, Flange, Trailer Air, 7-Way Hook-Up

    IOWA CUSTOMS

    $503.99
    Smooth Aluminum Custom Air Line Box W/ Trailer, Air & 1 7-Way Hookup* High Quality Airline Box* Smooth Aluminum * 45 Degree Front * With Flange * Trailer Air And One 7 Way Hook Up* Sold Individually*...
    09-0504102
    SKU:
    09-0504102
    Truck Class:
    Universal
    Make:
    Universal Items
    Material Options:
    Aluminum
    Style Options:
    Surface Mount
    Finish Options:
    Smooth
    Product Type:
    Frame & Chassis
    $503.99
    Qty in Cart: 0
    Price:
    $503.99
    Subtotal:
  • FREE SHIPPING OVER $249
    CSM Air Line Box Smooth Aluminum With Holes For 2 Airline & Single 7 Wire

    CSM Air Line Box Smooth Aluminum With Holes For 2 Airline & Single 7 Wire

    CHROME SHOP MAFIA

    $240.99
    Smooth Aluminum Air Line Box By Chrome Shop MafiaOrganize and protect your truck's air and electrical connections with this CSM Air Line Box Smooth Aluminum with Holes for 2 Airlines and Single 7...
    09-05040101
    SKU:
    09-05040101
    Truck Class:
    Universal
    Location:
    Made In USA
    Material Options:
    Aluminum
    Make:
    Universal Items
    Style Options:
    Surface Mount
    Product Type:
    Frame & Chassis
    Finish Options:
    Paintable
    $240.99
    Qty in Cart: 0
    Price:
    $240.99
    Subtotal:
  • FREE SHIPPING
    CSM Air Line Box Smooth Aluminum W/ Hole For Single Electrical Plug Hole

    CSM Air Line Box Smooth Aluminum W/ Hole For Single Electrical Plug Hole

    CHROME SHOP MAFIA

    $282.99
    Smooth Aluminum Air Line Box By Chrome Shop MafiaThe CSM Air Line Box Smooth Aluminum by Chrome Shop Mafia delivers rugged durability and customizable style. Featuring a pre-cut single electrical...
    09-05040100
    SKU:
    09-05040100
    Location:
    Made In USA
    Truck Class:
    Universal
    Material Options:
    Aluminum
    Make:
    Universal Items
    Finish Options:
    Smooth
    Style Options:
    Surface Mount
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $282.99
    Qty in Cart: 0
    Price:
    $282.99
    Subtotal:
  • FREE SHIPPING
    Coffin Style Air Line Box 304 SS 24 Inch With 2 Electric Plugs by CSM

    Coffin Style Air Line Box 304 SS 24 Inch With 2 Electric Plugs by CSM

    CHROME SHOP MAFIA

    $307.99
    16 Gauge 304 Stainless Steel Coffin Style Air Line Box By Chrome Shop MafiaThis 24-inch CSM Coffin Style air line box is made of 16 Gauge 304 stainless steel and is corrosion-resistant. It has...
    09-0504002
    SKU:
    09-0504002
    Truck Class:
    Universal
    Location:
    Made In USA
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Size Options:
    16 Gauge
    Style Options:
    Coffin Style
    Product Type:
    Frame & Chassis
    Width Options:
    24 Inch
    Type Options:
    Surface Mount
    Ready To Ship:
    Yes
    $307.99
    Qty in Cart: 0
    Price:
    $307.99
    Subtotal:
  • Smooth Aluminum Recessed Air Line Box W/ Flange - Hydraulic, Trailer Air, 7 Way Hookups

    Smooth Aluminum Recessed Air Line Box W/ Flange - Hydraulic, Trailer Air, 7 Way Hookups

    IOWA CUSTOMS

    $587.99
    Smooth Aluminum Recessed Air Line Box W/ FlangeThis quality Iowa Customs recessed air line box fits most trucks. It is made of lightweight aluminum with a radius bottom and a flange. The air line box...
    09-050400017
    SKU:
    09-050400017
    Truck Class:
    Universal
    Location:
    Made In USA
    Material Options:
    Aluminum
    Make:
    Universal Items
    Finish Options:
    Smooth
    Product Type:
    Frame & Chassis
    Type Options:
    Flush Mount
    Style Options:
    Flanged
    $587.99
    Qty in Cart: 0
    Price:
    $587.99
    Subtotal:
  • Smooth Aluminum Recessed Air Line Box Radius Bottom W/ Flange, Trailer Air, 7-Way, 4/6-Way Hookups

    Smooth Aluminum Recessed Air Line Box Radius Bottom W/ Flange, Trailer Air, 7-Way, 4/6-Way Hookups

    IOWA CUSTOMS

    $530.99
    Smooth Aluminum Recessed Air Line Box Radius Bottom W/ Flange, Trailer Air, 7-Way & 4/6-Way HookupsThis quality Iowa Customs recessed air line box fits most trucks. It is made of lightweight aluminum...
    09-050400013
    SKU:
    09-050400013
    Truck Class:
    Universal
    Make:
    Universal Items
    Finish Options:
    Smooth
    Style Options:
    Flush Mount
    Material Options:
    Aluminum
    Product Type:
    Frame & Chassis
    $530.99
    Qty in Cart: 0
    Price:
    $530.99
    Subtotal:
  • Stainless Steel Recessed Air Line Box Radius Bottom W/ Flange, Trailer Air, 7-Way, 4/6-Way Hookups

    Stainless Steel Recessed Air Line Box Radius Bottom W/ Flange, Trailer Air, 7-Way, 4/6-Way Hookups

    IOWA CUSTOMS

    $595.99
    Stainless Steel Recessed Air Line Box Radius Bottom W/ Flange, Trailer Air, 7-Way & 4/6-Way HookupsThis quality Iowa Customs recessed air line box fits most trucks. It is made of polished stainless...
    09-050400012
    SKU:
    09-050400012
    Truck Class:
    Universal
    Make:
    Universal Items
    Material Options:
    Stainless Steel
    Finish Options:
    Polished
    Style Options:
    Flush Mount
    Product Type:
    Frame & Chassis
    $595.99
    Qty in Cart: 0
    Price:
    $595.99
    Subtotal:
  • Smooth Aluminum Recessed Air Line Box Radius Bottom W/ Flange, Trailer Air, 2 7-Way Hookups

    Smooth Aluminum Recessed Air Line Box Radius Bottom W/ Flange, Trailer Air, 2 7-Way Hookups

    IOWA CUSTOMS

    $490.99
    Smooth Aluminum Recessed Air Line Box Radius Bottom W/ Flange, Trailer Air & 2 7-Way HookupsThis quality Iowa Customs recessed air line box fits most trucks. It is made of lightweight aluminum with a...
    09-050400011
    SKU:
    09-050400011
    Truck Class:
    Universal
    Make:
    Universal Items
    Finish Options:
    Smooth
    Style Options:
    Flush Mount
    Material Options:
    Aluminum
    Product Type:
    Frame & Chassis
    $490.99
    Qty in Cart: 0
    Price:
    $490.99
    Subtotal:
  • Stainless Steel Recessed Air Line Box Radius Bottom W/ Flange, Trailer Air, 2 7-Way Hookups

    Stainless Steel Recessed Air Line Box Radius Bottom W/ Flange, Trailer Air, 2 7-Way Hookups

    IOWA CUSTOMS

    $594.99
    Stainless Steel Recessed Air Line Box Radius Bottom W/ Flange, Trailer Air & 2 7-Way HookupsThis quality Iowa Customs recessed air line box fits most trucks. It is made of polished stainless steel...
    09-050400010
    SKU:
    09-050400010
    Truck Class:
    Universal
    Make:
    Universal Items
    Material Options:
    Stainless Steel
    Style Options:
    Flush Mount
    Finish Options:
    Polished
    Product Type:
    Frame & Chassis
    $594.99
    Qty in Cart: 0
    Price:
    $594.99
    Subtotal:
  • Smooth Aluminum Recessed Air Line Box Radius Bottom W/ Flange, Trailer Air, 7-Way Hookup

    Smooth Aluminum Recessed Air Line Box Radius Bottom W/ Flange, Trailer Air, 7-Way Hookup

    IOWA CUSTOMS

    $503.99
    Smooth Aluminum Recessed Air Line Box Radius Bottom W/ Flange, Trailer Air & 7-Way HookupThis quality Iowa Customs recessed air line box fits most trucks. It is made of lightweight aluminum with a...
    09-050400009
    SKU:
    09-050400009
    Truck Class:
    Universal
    Make:
    Universal Items
    Finish Options:
    Smooth
    Material Options:
    Aluminum
    Product Type:
    Frame & Chassis
    Location:
    Made In USA
    Style Options:
    Recessed
    Type Options:
    Flush Mount
    $503.99
    Qty in Cart: 0
    Price:
    $503.99
    Subtotal:
  • Smooth Aluminum Recessed Air Line Box 45 Degree Front W/ Flange, Trailer Air, 7-Way, 4/6-Way Hookups

    Smooth Aluminum Recessed Air Line Box 45 Degree Front W/ Flange, Trailer Air, 7-Way, 4/6-Way Hookups

    IOWA CUSTOMS

    $490.99
    Smooth Aluminum Recessed Air Line Box 45 Degree Front W/ Flange, Trailer Air, 7-Way & 4/6-Way HookupsThis quality Iowa Customs recessed air line box fits most trucks. It is made of lightweight...
    09-050400006
    SKU:
    09-050400006
    Truck Class:
    Universal
    Make:
    Universal Items
    Material Options:
    Aluminum
    Style Options:
    Flush Mount
    Finish Options:
    Smooth
    Product Type:
    Frame & Chassis
    $490.99
    Qty in Cart: 0
    Price:
    $490.99
    Subtotal:
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Adding your products to cart

Upgrade Your Rig with Semi-Truck Deck Plates & Air Line Boxes

Stay organized and safe with our heavy-duty deck plates and airline boxes built for semi-truck setups. Whether you're managing wiring, trailer air hookups, or just need a solid, non-slip surface behind your cab, this lineup has what you need.

Built for Commercial Use

Our deck plates for semi trucks are designed with durability and functionality in mind. Available in aluminum, stainless steel, and diamond plate finishes, they offer a clean look with rugged performance. You can even throw in some frame step accessories for better accessibility. Many include pre-drilled holes for easier mounting and cutouts for airline, 7-way, and hydraulic hookups—saving you time and hassle during installation. While you’re installing deck plates on your frame, consider swapping out your mud flaps to guard against dirt, mud, and snow. Looking for an airline box for your semi truck? These compact boxes help keep your trailer air lines and electrical connections neat, protected, and easy to access. Great for preventing air line hose wear and tangles during hookups.

Key Features:

- Slip-resistant deck plates for added safety when accessing storage.
- Cutouts and mounting kits available for easy airline and wiring access.
- Airline boxes with compartments for 7-way, 4/6-way, and air couplers.
- Ideal for aftermarket setups and custom rigs.
- Designed to meet the needs of commercial trucks and long-haul drivers. Whether you're installing a new mounting kit or replacing worn parts, this collection helps you stay road-ready.

Frequently Asked Questions About Deck Plates & Air Line Boxes

What are deck plates and air line boxes used for on a semi-truck?

Deck plates are the flat, often diamond-plated panels mounted behind the cab on the truck frame, providing a durable walking or storage surface and a clean finish to the back-of-cab area. Air line boxes are mounted on or near the deck plate to organize and protect the air and electrical lines that run between the tractor and trailer, keeping them secure, visible, and less prone to snagging or wear.

What materials are these products typically made from, and how do the finishes differ?

Most deck plates and air line boxes are constructed from aluminum or stainless steel. Aluminum options are lightweight and resist corrosion, while stainless steel offers added strength and a polished look. Finishes commonly include mill (raw) finish, diamond plate texture for slip resistance, and polished or mirror finishes for a show-truck appearance. The right choice depends on whether you're prioritizing weight savings, durability, or aesthetics.

Will a deck plate or air line box fit my specific truck make and model?

Fitment depends on your frame width, existing mounting holes, and cab-to-frame configuration, which can vary by manufacturer and model year. Many deck plates are designed as direct replacements for specific truck brands, while others are sold as universal fit and may require drilling or minor modification. Always check the listed compatibility details or measurements before ordering, and reach out to our team if you're unsure.

Are these parts difficult to install, and do I need special tools?

Installation difficulty varies by product. Direct-fit deck plates typically bolt into existing mounting holes using basic hand tools like wrenches and sockets. Universal fit plates or air line boxes may require drilling new holes or fabricating brackets, which calls for a drill, measuring tools, and sometimes welding equipment. If you're not comfortable with drilling or fabrication, having a shop handle the install is a reasonable option.

How do I maintain a deck plate or air line box to prevent rust and corrosion?

Regularly washing off road salt, grease, and grime helps prevent corrosion buildup, especially around mounting hardware and seams. Stainless and aluminum finishes generally resist rust better than raw steel, but polished surfaces can dull or spot over time without occasional cleaning and polishing. Checking bolts and brackets periodically for looseness or wear also helps extend the life of the part.


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