# Item 222 Single Wall 20 lbs — Packaging specification equivalence: neck finishes, corrugated grades and pallet standards

For Item 222 Single Wall 20 lbs, specification type is corrugated_board; description is Single wall corrugated fiberboard box per NMFC Item 222 / UFC Rule 41, max weight 20 lbs; primary dimension is 125 lbs/sq.in. burst; secondary dimension is 20 lbs max weight; equivalence or compatibility note is Min. ECT 23 lbs/in. width, recorded from its source on 2026-08-12.

- **Specification ID:** Item 222 Single Wall 20 lbs
- **Specification type:** corrugated_board _(our reading, not quoted from the source)_
- **Description:** Single wall corrugated fiberboard box per NMFC Item 222 / UFC Rule 41, max weight 20 lbs
- **Primary dimension:** 125 lbs/sq.in. burst
- **Secondary dimension:** 20 lbs max weight
- **Equivalence or compatibility note:** Min. ECT 23 lbs/in. width
- **Additional data:** Max outside dimensions L+W+D 40 in.; min combined weight of facings 52 lbs per 1,000 sq.ft.

## What the source says

> Single Wall Corrugated Fiberboard Boxes 20 40 125 52

## Source

- https://www.ipack.com/blog/corrugated-rules-and-regulations

Last verified: 2026-08-12. Review by: 2028-08-11.
Part of [Packaging specification equivalence: neck finishes, corrugated grades and pallet standards](https://referencesource.org/packaging-material-specification-equivalence/).