ASTM D5118 certified

ASTM D5118

ASTM D4727 certified

ASTM D4727

CSA Class Code A certified

CSA Class Code A

30 x 30 x 6 Flat Corrugated Boxes

30 x 30 x 6 flat corrugated boxes are shallow, wide-format containers built for shipping large flat items such as artwork, glass panels, signage, and electronic assemblies. Available in single or double wall corrugated board with Mullen or ECT strength ratings, they minimize dimensional weight while protecting oversized, low-profile shipments during transit and storage.

Military Boxes
Shipping Boxes - Cardboard & Corrugated Boxes
V3C Boxes ASTM D5118
Moving Boxes
Hazardous Material Boxes
Stock Boxes
Bulk Cargo Boxes / Gaylord Boxes
Telescoping Boxes
Sheets & Pads

Our Range of Products

Military Boxes

Military Boxes

  • MIL-SPEC weather resistant V3c & W5c boxes
  • ASTM D5118 compliant for military shipping
  • Custom dimensions tailored to exact needs
Shipping Boxes - Cardboard & Corrugated Boxes

Shipping Boxes - Cardboard & Corrugated Boxes

  • Over 1,000 stock sizes ready for fast shipment
  • Custom sizes with 7-10 day production turnaround
  • Single, triple wall options with ECT/Mullen ratings
V3C Boxes ASTM D5118

V3C Boxes ASTM D5118

  • Pre-printed Fragile labels and write-on panels
  • Flap tabs keep box flaps secure while packing
  • Economy to heavy-duty double wall options
Moving Boxes

Moving Boxes

  • Kraft brown finish for reliable moving protection
  • Single or double wall construction available
  • Stock standard sizes ready to ship quickly
Hazardous Material Boxes

Hazardous Material Boxes

  • Designed for military and hazardous material shipping
  • Custom or stock sizes to fit regulatory needs
  • Single and double wall corrugated construction
Stock Boxes

Stock Boxes

  • Custom-sized boxes cut shipping costs and waste
  • Low minimum order quantity starting at 100 pieces
  • Full-color custom printing for branded packaging

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Frequently Asked Questions

What are 30 x 30 x 6 flat corrugated boxes used for?

These shallow, wide-format boxes are ideal for shipping flat or low-profile items such as artwork, framed glass, signage, electronic panels, and printed materials. Their broad footprint and shallow depth prevent shifting during transit while protecting contents from crushing and edge damage.

What wall construction options are available for 30 x 30 x 6 boxes?

Can I order custom sizes similar to 30 x 30 x 6 boxes?

Do these boxes meet shipping strength requirements for UPS and FedEx?

Are 30 x 30 x 6 boxes suitable for palletized shipments?

What is the minimum order quantity for stock or custom boxes?

Do you offer weather-resistant or government-spec versions of flat boxes?

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

Industries We Serve

E-Commerce & Retail Shipping

E-Commerce & Retail Shipping

Flat corrugated boxes protect large, thin retail goods like framed prints and electronics during parcel fulfillment.

Moving & Relocation

Moving & Relocation

Shallow flat boxes safely transport mirrors, artwork, and framed items during residential or commercial moves.

Industrial & Bulk Manufacturing

Industrial & Bulk Manufacturing

Used to transport flat panels, sheet materials, and components between manufacturing and distribution facilities.

Government & Military Logistics

Government & Military Logistics

Weatherized flat corrugate meets ASTM specs for shipping regulated flat equipment and document panels.

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

You might also like

Why E-Commerce, Industrial & Government Shippers Choose Cardboard Boxes 4 U

1,300+ Box Sizes In Stock

Access one of the largest corrugated inventories available, including hard-to-find flat, oversized, and specialty box configurations.

Government & Military Spec Expertise

Specialized in ASTM D5118 and D4727 compliant weatherized corrugate trusted for defense, aerospace, and regulated shipments.

Custom Manufacturing Capabilities

Short and long production runs with 7-10 day turnaround for custom-sized flat boxes built to your exact dimensions.

Get a Fast Quote on 30 x 30 x 6 Flat Corrugated Boxes

Tell us your quantity and specs, and our packaging specialists will follow up with pricing, stock availability, and lead times.

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