# Elevated temperature solid, n.o.s., at or above 240° C, see 49 CFR 173.247(h)(4) · USPS — Mailing and air-carriage restrictions by item category

For Elevated temperature solid, n.o.s., at or above 240° C, see 49 CFR 173.247(h)(4) · USPS, item category is Elevated temperature solid, n.o.s., at or above 240° C, see 49 CFR 173.247(h)(4); carrier is USPS; restriction type is prohibited; scope is domestic mail (air and surface); conditions is Hazard class 9, UN3258, packing group III; domestic mail air: Prohibited; domestic mail surface: Prohibited, recorded from its source on 2026-08-10.

- **Item category:** Elevated temperature solid, n.o.s., at or above 240° C, see 49 CFR 173.247(h)(4) _(verified: appears in the quote below)_
- **Carrier:** USPS _(our reading, not quoted from the source)_
- **Restriction type:** prohibited _(our reading, not quoted from the source)_
- **Scope:** domestic mail (air and surface) _(our reading, not quoted from the source)_
- **Conditions:** Hazard class 9, UN3258, packing group III; domestic mail air: Prohibited; domestic mail surface: Prohibited

## What the source says

> Elevated temperature solid, n.o.s., at or above 240° C, see 49 CFR 173.247(h)(4) 9 UN3258 III Prohibited Prohibited

## Source

- https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf

Last verified: 2026-08-10. Review by: 2027-08-10.
Part of [Mailing and air-carriage restrictions by item category](https://referencesource.org/shipping-restrictions-by-class/).