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EVC11932

Auto-Bottom Tuck-Top 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

Pre-glued base deploys automatically for fast packing
Friction tuck top provides a clean presentation
Well suited for lightweight to medium-weight products

About this product

The EVC11932 is a corrugated carton designed for rapid manual packing. Commonly known as a crash-lock or auto-bottom box, it features a pre-glued base that automatically folds into a locked floor when the flat tube is squared.

By removing the need to fold or tape the bottom flaps, this style reduces assembly time on the pack bench. The top closes with a simple friction tuck, making it a practical choice for retail fulfillment, kitting, and lightweight consumer goods.

Common uses

High-volume retail fulfillment
Subscription boxes with outer seal
Lightweight kitting

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Retail Fulfillment, Kitting, and Secondary Packaging

Retail fulfillment and kitting

When packing speed is the primary bottleneck, the auto-bottom base removes bottom taping from the workflow. Packers simply square the box, load the product, and tuck the top.

Subscription packs and direct distribution

The clean tuck top offers a neat unboxing experience without the mess of bottom tape. For direct shipping, the top tuck often benefits from a clear wafer seal or security label depending on the courier network.

High-volume secondary packaging

Operations packing smaller retail cartons into a larger master shipper can use this style to accelerate the process. The fast assembly keeps the line moving without waiting for automated case erectors.

Lightweight consumer goods

Apparel, cosmetics, and soft goods are well suited for this design because they do not place excessive weight on the interlocked bottom flaps.

Manual Pack Benches and High-Volume Fulfillment

Fast-paced manual pack benches

Operations that rely on hand assembly benefit most from this design. The labor savings on the pack line often offset the production preparation needed for the pre-glued base.

Contract packaging and 3PLs

When labor time per unit is a direct cost driver, removing the bottom taping step can noticeably improve throughput on large fulfillment contracts.

E-commerce fulfillment centers

Facilities processing high volumes of lightweight orders can use this box to speed up the packing station, provided they add a top seal for transit.

When Heavy Products or Short Runs Point to Other Boxes

Heavy or dense products

Crash-lock bases rely on glued joints and interlocked flaps to hold the payload. For heavy industrial parts or dense liquids, a standard taped bottom or a fully supported tray provides better drop-out resistance.

Short production runs or trials

Because the auto-bottom relies on specific folder-gluer equipment to produce, it is less practical for very small orders. A manual snap-lock bottom may be a better choice for short runs.

Board Thickness, Production Volume, and Closure Choices

Board thickness and flute choice

The diagonal folds of the crash-lock base are sensitive to material thickness. E-flute and B-flute fold smoothly and deploy consistently. Heavier boards, like C-flute or double-wall, can bind during assembly or fail to fold flat, making careful testing necessary before production.

Top closure and parcel sealing

The standard friction tuck holds well for retail shelves or master-packed pallets. If the box will be shipped individually through a parcel network, discuss adding slit locks to the tuck flap or planning for an external tamper-evident seal.

Order size and production method

The crash-lock base is folded and glued on a specialized multi-point folder-gluer. The preparation for this machinery makes it most practical for repeat programs or larger runs where the packing labor savings outweigh the production preparation.

Pallet density and storage space

These boxes are delivered knocked-down and flat. However, the pre-glued base adds a slight thickness to the folded blank compared to an unglued box, which slightly reduces the number of boxes that fit on a single pallet.

Adjusting the Tuck Flap and Dust Flaps

Slit locks for the tuck flap

The standard friction tuck can be modified with slit locks, which are small tabs that catch on the side dust flaps, to provide a more secure closure that resists opening during handling.

Dust flap modifications

The side dust flaps can be extended or shaped to better support the main lid panel or to clear specific internal product arrangements.

Tuck flap depth

The depth of the top tuck flap can be increased to provide more friction surface against the front wall, helping the lid stay closed during handling.

Packing details

Base floor leveling

The interlocked bottom flaps create a slightly uneven interior floor. If packing fragile items or using rigid inserts, a flat corrugated pad can be added to level the bottom.

Additional notes

Parcel sealing and outer carton choice

If these boxes are used as primary packaging for e-commerce, they are often packed into a larger master shipper to protect the tuck top and maintain a clean presentation upon arrival.

FAQs

How much weight can an auto-bottom box hold?

The weight limit depends on the board grade and the adhesive used by the manufacturer. While excellent for lightweight to medium-weight consumer goods, heavy items can stress the interlocked base. Always test a physical sample with your actual product.

Why is this box better suited for larger production runs?

Can I ship this box through the mail without tape?

The bottom is secure, but the friction tuck top can open if the box is dropped or crushed in a courier network. For parcel shipping, the top closure often benefits from a clear seal, a piece of tape, or a shipping label.

Can I order this in a heavy double-wall corrugated?

Thick double-wall board is generally not recommended for this style. The complex diagonal folds needed for the base to deploy tend to bind or tear when made from heavy flutes. E-flute or B-flute are the safest choices for consistent assembly.

How much faster is this than a standard box?

Because the base forms automatically when the box is squared, it completely removes the steps of folding four bottom flaps and applying tape. For manual pack benches, this can noticeably increase the number of units packed per hour.

Will a prototype behave exactly like the final production box?

A hand-cut, hand-glued prototype will prove the dimensions and fit, but it may feel slightly stiffer than a machine-glued production run. The true deployment speed is best evaluated on a machine-run sample.

Can I use custom inserts with a crash-lock base?

Yes, but the overlapping base flaps create a slightly uneven interior floor. If your insert needs a perfectly flat surface to sit correctly, you may need to add a leveling pad at the bottom.

Does the glued bottom affect exterior printing?

The bottom panels have overlapping seams and glued areas, making them less suitable for continuous graphics. Critical branding and text are better placed on the main side walls or the top lid.