The structural difference
A wood box is fully enclosed with six solid walls - top, bottom, two sides, two ends - built from either cleated plywood (plywood panels on a wood frame), nailed solid-lumber, or screwed-panel construction. The cargo is sealed inside and protected from dust, light impact, pilferage, and surface damage.
A wood crate can have open-slat walls (classic field-pack produce crate, nursery stock crate), part-enclosed construction (bottom and sides solid, top open), or fully enclosed (which overlaps with box construction). The classic wood crate has open-slat walls for airflow and cargo visibility.
The practical distinction: box means sealed and enclosed; crate means open-wall or part-enclosed and often heavier structurally. For defense and aerospace cargo you want a box (sealed, documented, pilferage-resistant). For heavy equipment and oversized loads you want a crate (heavy structural members, open visibility for inspection).
| Factor | Wood box | Wood crate (open-slat) | Wood crate (part-enclosed) |
|---|---|---|---|
| Wall construction | Solid 6-wall | Open slats + frame | Mixed solid + open |
| Pilferage protection | High | None | Partial |
| Airflow | None | High | Partial |
| Cargo visibility | None (sealed) | Full | Partial |
| Weight (36-inch cube) | 35 - 70 lb | 20 - 40 lb | 30 - 55 lb |
| Cost (36-inch cube) | $45 - $140 | $25 - $80 | $40 - $120 |
| Mil-spec compliance | Yes (MIL-STD-2073) | No | Partial |
| Industries | Defense, aerospace, firearms, medical | Heavy equipment, machinery, ag | Industrial, specialty cargo |
When to use a wood box
For pilferage-sensitive cargo. Defense weapon-system components, aerospace parts, firearms, ammunition, and high-value industrial equipment all require sealed six-wall construction. A box can be lock-sealed with lock-hasps and padlocks; a slat crate cannot.
For fragile cargo that needs enclosed protection. Electronics, optical components, medical devices, scientific instruments, and precision machined parts all ship better in boxes with foam-cushioned interior.
For mil-spec and government shipping. MIL-STD-2073 (DoD packaging standard) specifies methods 10 through 50 for enclosed-box construction. Government and defense shippers specify wood boxes with full documentation chain and MIL-STD-129 marking.
For ISPM-15 export shipments where the cargo value justifies the sealed construction. High-value industrial equipment to overseas destinations ships in heat-treated wood boxes with full documentation.
When to use a wood crate
For heavy equipment and oversized cargo where visibility and inspection matter. Industrial machinery, construction equipment, and large sub-assemblies ship in open-slat or part-enclosed crates where the receiver can inspect the cargo at delivery without unpacking.
For airflow-needing cargo. Freshly-finished parts (recent paint, specialty coatings) need airflow during transit to avoid moisture entrapment. Open-slat crates allow this; sealed boxes do not.
For heavy structural requirements. Classic wood crates often use heavier structural members (2x6 or 2x8 frame) than cleated plywood boxes. For a 10,000-lb load the crate's heavier framework provides better structural integrity.
For agricultural shipping where airflow and moisture handling matter. Field-pack produce, nursery stock, and specialty-crop shipping use open-slat crates almost exclusively.
The overlap zone - part-enclosed crates
Many shipments fall between pure box and pure crate. A part-enclosed crate (solid bottom and side walls, open or slat top) protects the cargo from dust and surface damage while allowing some airflow and inspection visibility. Specialty industrial, specialty machinery, and mid-value industrial shipping often uses this hybrid.
For a specific shipment decide by: pilferage risk (high = box, low = crate), inspection need (high = crate, low = box), weight (heavy = crate, light = box), cargo environment during transit (dusty = box, clean = crate).
Industry recommendations
Defense primes + sub-tier
Boxes exclusively. MIL-STD-2073 methods 10-50, MIL-STD-129 marking, full documentation chain.
Aerospace OEM
Boxes for sub-components and avionics (foam-cushioned, climate-controlled). Crates for large aerospace tooling and oversized sub-assemblies.
Firearms + ammunition
Boxes exclusively. SAAMI-compliant construction with lock-ready lids.
Medical device + imaging
Boxes with foam cushioning for high-value equipment. Crates rarely used in this industry.
Semiconductor + precision electronics
Boxes with climate-controlled interior and dessicant packing. Crates not used.
Heavy equipment OEM
Crates for most finished-equipment shipping (large open-slat or part-enclosed with heavy framing). Boxes for parts, sub-components, and specialty-tooling moves.
Industrial machinery + CNC
Mixed - crates for the machine body, boxes for the control electronics and tooling.
Agriculture + nursery stock
Crates exclusively (open-slat for airflow). Boxes not used in this industry.
The decision
Use a wood box if: your cargo is pilferage-sensitive, fragile and needs enclosed protection, requires mil-spec or NQA-1 documentation, is high-value and the sealed construction cost is justified, or needs climate-controlled or dust-free transit. See our wood box catalog for cleated plywood, nailed solid-lumber, MIL-STD-2073 mil-spec, NQA-1 nuclear-grade, SAAMI firearms, and ISPM-15 export.
Use a wood crate if: your cargo is heavy equipment or oversized, needs airflow during transit, requires visibility for inspection, or is lower-value industrial where enclosure is unnecessary. See our wood crate catalog for custom, mil-spec, and ISPM-15 export crates.
Frequently asked questions
What is MIL-STD-2073 and why does it matter?
MIL-STD-2073 is the US DoD standard for military packaging. It specifies methods of preservation (methods 10 through 55, from unprotected to hermetically sealed), wood species, moisture content, fastener schedule, and interior bracing. Defense primes and sub-tier suppliers specify MIL-STD-2073 for government cargo. We build to methods 10, 20, 30, 40, and 50.
Can a wood crate be heat-treated and ISPM-15 stamped?
Yes - any wood crate crossing international borders requires ISPM-15 heat-treatment and IPPC stamping. We supply both open-slat crates and sealed boxes with ISPM-15 stamping at our APHIS-registered facility.
Do you supply NQA-1 nuclear-grade documentation for boxes?
Yes - for nuclear-grade requirements we build with materials certification, lot traceability, fastener-schedule compliance, and third-party inspection availability per NQA-1 specification. Lead time 15-25 days from PO.
What foam cushioning options do you supply inside boxes?
Polyurethane and polyethylene foam die-cut to cargo profile. For instrument-grade shipping we use convoluted or multi-density foam specified by the cargo manufacturer. We also match existing foam specification from a current supplier.
Can I lock a wood box?
Yes - we add steel lock-hasps to the lid for padlock-ready construction. Padlocks are supplied by the shipper. For transport-only security (no field access needed), tamper-evident banding is also available.
Are wood crates cheaper than wood boxes?
For comparable size, open-slat crates are typically 30-50 percent cheaper than cleated plywood boxes due to less material. For heavy-structural crates with 2x6 or 2x8 framing, costs can equal or exceed boxes.
Can I ship fragile aerospace parts in a crate instead of a box?
For airflow-needing recently-finished composite parts, a part-enclosed crate works. For pilferage-sensitive avionics or electronics, use a box. Aerospace suppliers typically specify the construction per PO.
What is the typical lead time for a cleated plywood wood box?
For published sizes: 1-7 business days from PO. For mil-spec with documentation: 7-15 business days. For NQA-1 with third-party inspection: 15-25 business days.
Updated 2026-10-07