Mil-Spec Weather Resistant Packaging
W5c Boxes Built to ASTM D5118 Spec
Coated fiber corrugated boxes that resist water and water vapor. Order stock sizes or get a custom W5c size made to your exact dimensions.
- Meets Government Board ASTM D5118 standard
- 275 PSI board with water and water vapor resistance
- Stock sizes plus custom W5c sizes to order
Compliance certification documentation available for W5c and V3c orders.
Prefer to talk? Call (888) 333-9513 Ext 2
Get pricing on W5c boxes
Tell us your sizes and quantity. We will send pricing and confirm the spec you need.
Why buyers choose our W5c boxes
Built to the written spec
W5c boxes are made from coated fiber corrugated fiberboard and meet the Government Board ASTM D5118 standard.
Moisture protection you can count on
W5c board is classified Water and Water Vapor Resistant (WWVR), so contents stay protected in damp conditions.
Custom sizes, not just stock
Need a size that is not on the shelf? We make custom W5c boxes to your inside dimensions.
Paperwork for your contract file
Compliance certification documentation is available so you can prove the box meets spec.
One source for mil-spec corrugate
W5c, V3c 350# test, V11c trimmed sheets and Fast Pack boxes all come from the same supplier.
Help picking the right board
Call and talk through your load, route and spec before you buy. Sample orders are available.
W5c box specs and options
W5c is a weather-resistant military specification box. It uses a lighter-weight coated fiber corrugated board built to 275 PSI bursting strength. That makes it a good fit for interior or domestic military packaging where you need moisture protection but not the heaviest grade.
If your job calls for more protection, V3c is the step up: 350# test corrugated fiberboard conforming to ASTM D4727, meeting WRA and MPA water resistance standards. Tell us your application and we will quote the grade that matches your spec.
- Board: coated fiber corrugated fiberboard, Government Board ASTM D5118
- Bursting strength: 275 PSI for W5c weather-resistant construction
- Classification: Water and Water Vapor Resistant (WWVR)
- Custom W5c sizes made to your inside dimensions
- Stock W5c sizes such as 7" x 7" x 13" and 24" x 12" x 12"
- V3c option: 350# test, ASTM D4727, WRA and MPA compliant
- V11c mil-spec trimmed corrugated sheets also available
- Compliance certification documentation available as a separate item
- Custom box lead time is usually 10 to 14 days
What happens after you submit
We review your spec
We check the sizes, quantity and standard you listed, and flag anything that needs clarifying.
You get a written quote
We price stock W5c sizes or a custom run, and confirm whether compliance documentation is needed.
We confirm and produce
Approve the quote and we schedule the order. Custom W5c work usually takes 10 to 14 days.
Frequently asked questions
What is the difference between W5c and V3c boxes?
W5c is a lighter-weight weather-resistant military spec box rated at 275 PSI bursting strength, made for interior or domestic military packaging. V3c is heavier duty at 350# test, conforms to ASTM D4727 and meets WRA and MPA standards for severe conditions like high humidity and ocean transport. Both are built to ASTM D5118.
Can I get a custom size W5c box?
Yes. We make custom size W5c boxes from coated fiber corrugated board that meets the ASTM D5118 Government Board standard. Send us your inside dimensions and quantity and we will quote it.
Is there a minimum order?
Stock W5c items are sold in set increments, and custom box runs start at a 100-piece minimum. Tell us your quantity in the form and we will confirm the minimum for your exact size.
How long does a custom W5c order take?
Lead time for custom mil-spec work is usually 10 to 14 days. Stock sizes ship from our inventory. We confirm timing on your quote.
Can you supply compliance paperwork?
Yes. Compliance certification documentation is available for these boxes. Ask for it when you request your quote so we include it on the order.
Do you ship outside the United States?
No. We sell and ship within the USA only, from multiple shipping points across the country.
Get your W5c box pricing
Send your sizes, quantity and the spec you have to meet. We will come back with pricing and confirm the right board for the job.
- Meets Government Board ASTM D5118 standard
- 275 PSI board with water and water vapor resistance
- Stock sizes plus custom W5c sizes to order
Prefer to talk? Call (888) 333-9513 Ext 2