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FEFCO 0701

Auto-Lock Crash-Bottom 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

Instant-locking base eliminates bottom taping
Standard slotted top needs tape or an added adhesive strip
Requires a dedicated production run for the pre-glued base

About this product

The auto-lock crash-bottom box combines the speed of an instant-setup base with the security of a standard slotted top. Push the opposite corners inward, and the pre-glued bottom automatically locks into a rigid floor, eliminating the need to tape the base before loading.

This design trades a more complex production route for massive labor savings at the pack bench. It is a common choice for high-volume e-commerce and fast-paced fulfillment lines where seconds matter.

Common uses

High-volume e-commerce fulfillment
Kitting and assembly lines
Return-heavy retail with added peel-and-seal strips
Subscription box packing

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High-speed packing jobs

High-volume e-commerce fulfillment

The instant base setup cuts packing time. This makes it a practical option for fast-moving consumer goods, apparel, and electronics.

Kitting and assembly lines

Operators can pop the box open with one motion and immediately begin loading components. They avoid wrestling with a tape dispenser on the bottom seam.

Subscription box packing

When packing hundreds of identical boxes, the auto-lock base keeps the line moving quickly while the slotted top provides a familiar unboxing experience.

High-speed retail returns

When modified with a peel-and-seal strip and tear tape, this box allows customers to easily open and securely reseal the package for return shipping.

Fulfillment and retail channels

Third-party logistics (3PL)

When throughput dictates profitability, removing the bottom-taping step across thousands of orders yields measurable labor savings.

Return-heavy retail

Adding adhesive strips turns this fast-packing box into a two-way mailer, simplifying the return process for apparel and footwear brands.

Fast-moving consumer goods (FMCG)

For lightweight packaged goods, the crash-lock base provides enough support while keeping the packing line moving at top speed.

When to consider a different box

Short runs and prototypes

If you are ordering a small trial batch, the complex gluing path makes this less practical. Compare the Snap-Lock Bottom (0711), which folds manually but runs on simpler equipment.

Heavy industrial payloads

The crash-lock base can open under concentrated center point loads. For dense parts, compare a standard Regular Slotted Carton (0201) with a fully taped bottom.

Close variants and lookalike dielines

The closest library neighbors include 0704, 0708, 0709. 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, closure, and production choices

Board thickness and lock binding

Fine to medium flutes fold crisply and lock reliably. Heavy double-wall board increases pop-open resistance and risks binding the complex base tabs.

Top closure method

The standard template requires pack-bench tape to seal the top flaps. If you want a tool-free experience for your packers and customers, discuss adding peel-and-seal adhesive strips.

Production route and order maturity

This box requires a flatbed die-cutter and a multi-point folder-gluer. It is suited for mature, repeat programs rather than short trial runs.

Payload weight and base support

The interlocking base is strong because the payload weight pushes the flaps together, but dense, heavy items may still require a taped bottom or reinforcing inserts.

Template adjustments beyond length, width, and height

Locking tab profiles

The internal hooks that secure the base can be adjusted for sharper or rounded profiles, depending on the board grade and the factory stripping equipment.

Top flap taper

The top flaps can be slightly tapered to prevent catching if the boxes will be sealed by automated case taping machinery.

Height-adjustable creases

Horizontal score lines can be added at set intervals, allowing packers to cut the corners and fold the top flaps lower to match the product height.

Board and packing details

Flat delivery and storage

Despite the complex pre-glued base, these boxes ship knocked-down flat. The glued overlap adds slight bulk to the bundle compared to unglued sheets.

Parametric safety

The clearance between the interlocking base hooks is tightly tied to the exact board thickness. Changing the material grade requires recalculating the template so the base does not jam during assembly.

Variants and options

0701_1

Features modified locking tab geometries or top flap contours to accommodate specific factory limits while maintaining the same instant-setup base.

Additional notes

Short digital trial versus repeat run

Prototyping this box on a digital cutting table is useful for checking size. Manual gluing will not perfectly simulate the crush and fold behavior of a factory folder-gluer.

Peel-and-seal modifications

Adding adhesive strips and tear tape is a common upgrade for e-commerce, turning the 0701 into a premium, tool-free mailer.

FAQs

Closure and shipping

Can this box be shipped without tape?

No. While the bottom locks automatically, the top flaps are standard slotted style. They need packing tape or a custom peel-and-seal strip to stay secure during parcel transit.

Production and volume

Why is this box used mostly for large orders?

The 0701 requires a flatbed die-cutter for the diagonal creases and a multi-point folder-gluer to pre-glue the base. This complex production path is suited for mature, high-volume programs.

Product fit

Will the bottom hold heavy items?

The interlocking base is strong because the payload weight pushes the flaps together. However, it can open under extreme, concentrated center loads. Heavy industrial parts usually require a taped bottom or reinforcing inserts.

Board and material

Can I use double-wall board for extra protection?

It is risky. Thick double-wall board makes the diagonal creases stiff, requiring extreme manual force to pop the box open. The locking tabs can also bind. Medium or fine flutes fold more reliably.

Packing route

Can automated machines erect this box?

The top flaps are compatible with standard automated case sealers. The crash-lock base requires specific multi-point erecting machinery. It is primarily used to speed up manual pack benches.

Storage and handling

How does it arrive from the factory?

It arrives knocked-down flat. The factory has already glued the side seam and the complex base joints. You only need to push the corners to open it.

Adjustments

Can I adjust the height of this box for different products?

Yes. You can request horizontal height creases at set intervals. Packers can slice the corners down to the right crease and fold the top flaps lower, reducing the need for void fill.

Mechanism

How does the crash-lock base actually work?

The base features 45-degree diagonal creases. When you push the opposite corners of the flat box inward, these creases act as hinges, forcing the bottom flaps to swing down and interlock automatically.