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FEFCO 0203

Full Overlap Box

  • Available in a wide range of custom configurations & material selection.
  • Order 1 sample. Or order 100K+ units. Or anything in between.
  • Affordable delivery across North America.
  • Design support, warehousing, testing, assembly available.
  • Widest machinery capability in America via 30+ specialist partner plants.
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Product details

Top highlights

  • Double-thick top and bottom for heavy payloads
  • Removes the central seam to increase base strength
  • Sealed externally using heavy-duty tape, strapping, or metal stitching

About this product

The full overlap box (FOL) replaces the vulnerable center seam of a standard shipping carton with a continuous, double-thick layer of corrugated board. By extending the outer flaps across the entire width of the box, it creates a reinforced floor and lid that resist bottom failure under heavy loads.

This box uses far more material than a standard carton, making it a deliberate choice for heavy industrial parts, dense payloads, narrow dimensions, or shipments that require extra security against tampering.

Common uses

  • Heavy and dense industrial parts
  • Narrow or elongated products
  • High-security transit
  • Stacked pallet loads with concentrated weight

Get a quote

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Best Price Guarantee

Already have a packaging quote? Let us beat it.

Send us the quote you have. We will beat it for the same specifications, quantity, and delivery requirements.

Upload a competing quote

Free quote review. No obligation.

30+specialist partner plants

We supply through the plant best suited to your price, material, production, and delivery requirements.

Why we can beat a lower quote

30+ plants give us more ways to lower the price.

Each plant has different machinery, material costs, order minimums, and freight rates. Our buying volume helps us secure better pricing. We then quote through the plant that gives you the lowest total price for your requirements.

Send us your current quote. Watch us beat it.

Attach it to the quote form or email it to us. We'll review it free and send you our price.

Upload a competing quoteinfo@herculeindustrial.com
Best Price Guarantee terms

To qualify, send a written supplier quote dated within the past 30 days and addressed to your company. It must cover the same dimensions, construction, material, print, finish, quantity, tooling, freight, delivery date, and delivery location. The guarantee does not cover taxes, expired quotes, liquidation or clearance sales, or obvious pricing errors.

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Heavy-duty and secure shipping applications

Heavy and dense industrial parts

The double-layered base supports concentrated weight that would stress a standard center seam, making it highly effective for dense hardware or metal components.

Narrow or elongated products

When a box is very narrow, standard meeting flaps are too short to provide enough surface area for a reliable seal. Full overlap flaps solve this by providing a wide, continuous surface for fastening.

High-security transit

The overlapping flap arrangement, especially when strapped or stitched, makes it extremely difficult to pry open the carton discreetly during transport.

Stacked pallet loads

The double-thick top and bottom provide a flat, reinforced surface that helps distribute weight when heavy pallets are stacked, reducing the risk of corner crush.

Industries relying on double-thick closures

Industrial manufacturing and automotive

Shipping dense metal components, hardware, or tools requires extreme puncture resistance to keep parts from breaking through the floor.

High-value electronics and export

Protecting sensitive goods through demanding freight routes where stacking pressure and tampering are constant risks.

Loose hardware and bulk components

Packing loose items that shift during transport requires a solid floor that resists puncture from the inside out.

When to consider standard or partial-overlap boxes

Lighter payloads and predictable routes

If the product is relatively light and the route is predictable, a Regular Slotted Container (FEFCO 0201) uses far less board.

Moderate reinforcement needs

If a center seam is a risk but full overlaps consume too much material, a Partial Overlap Box (FEFCO 0202) offers a middle ground for stitching and strength.

Close variants and lookalike dielines

The closest library neighbors include 0206b, 0202a, 0205a. Use this as a variant check if a buyer brings an old code, sample, or dieline that looks close. The deciding details are usually the lock, slot, closure, wall build, part count, or fold sequence.

Board grade, closure, and packing route choices

Board thickness and flute profile

Because this box is chosen for strength, it is frequently specified in double-wall board. Heavy board requires wider slots and specific fold allowances to prevent the massive flaps from binding during assembly.

Closure method

The flaps must be secured externally. While heavy-duty packing tape works, industrial applications often use metal stitching or strapping to lock the double-thick layers together.

Packing labor

Folding and squaring large, heavy-board flaps requires more effort than a standard box. Packers must hold the flaps flush while applying the seal.

Delivery format and storage space

Because the flaps are exceptionally long, the knocked-down flat bundles take up more pallet space than standard boxes, which affects inbound storage planning.

Clearance and layout adjustments for heavy board

Slot clearance tuning

For double-wall or triple-wall board, the inner flap corners and slots can be relieved so the thick material folds 90 degrees without crushing the adjacent panels.

Factory folding layout

The blank can be oriented to run through the factory machinery starting with either the length or width panel, ensuring the massive flat footprint fits the production line.

Flap chamfering for thick board

Inner flaps can be angled or relieved at the corners to ensure heavy double-wall board folds cleanly without binding.

Board and packing details

Flat footprint and production planning

The flat, unfolded footprint of this box is exceptionally large. Very large box dimensions may require specialized large-format factory machinery.

Closure compatibility with packing lines

Because the outer flaps cover the entire width, standard automated case sealers calibrated for meeting flaps may require adjustment or manual intervention to secure the top and bottom.

Production layout variants

Heavy-board clearance tuning (0203b)

Adds explicit chamfers and relief cuts to the inner flaps, ensuring thick double-wall board can fold cleanly without binding.

Additional notes

Anti-tamper security

When sealed with strapping or heavy stitching, the double-thick overlapping flaps make it extremely difficult to pry open the carton discreetly during transport.

Related shipping boxes

0202: Partial Overlap Box

Consider this alternative if the job requires a stitched center seam but full overlaps consume too much material.

FAQs

Closure and sealing

How is a full overlap box sealed for shipping?

The flaps do not lock natively. The top and bottom must be secured externally using heavy-duty packing tape, strapping, or metal stitching to handle the intended route.

Cost and material

Why does this box use more material than a standard shipping carton?

The outer flaps extend across the entire width of the box, consuming nearly twice as much corrugated board for the top and bottom closures compared to a standard box where the flaps just meet in the middle.

Board and strength

Does this box require double-wall corrugated board?

Not strictly, but it is highly recommended for the heavy-duty jobs this box usually handles. If choosing double-wall, the factory will adjust the slot widths so the thick flaps fold without binding.

Packing labor

Is this box harder to assemble than a standard carton?

Yes, slightly. The large overlapping flaps, especially in heavy board grades, require more physical effort to fold flat and hold square while applying the final seal.

Product fit

Why is this style used for long, narrow products?

On a very narrow box, standard flaps that meet in the center are too short to provide enough surface area for packing tape to grip. Full overlap flaps solve this by providing a wide, continuous surface for sealing.

Production limits

Are there size limits for full overlap boxes?

Because the unfolded blank is very tall, large dimensions can exceed the capacity of standard factory folder-gluers, requiring specialized large-format machinery.

Inserts and product fit

Can this box be used with internal dividers?

Yes. The flat, double-thick floor provides an excellent base for heavy partitions or foam inserts, keeping them stable during transport.

Samples and prototyping

Should we test the closure method before ordering?

Yes. Because the overlapping flaps create a thick, rigid surface, it is best to test your preferred tape, strapping, or stitching method on a physical sample to ensure it holds the payload securely.