# Diesel fuel (NA1993) — Postal shipping restrictions by item category

For Diesel fuel (NA1993), carrier is USPS; restriction type is restricted; scope is domestic mail via surface transportation; conditions is Mailable if qualifies as Limited Quantity surface material and meets conditions; Packaging Instruction 3B must be followed, recorded from its source on 2026-08-04.

- **Item category:** Diesel fuel (NA1993)
- **Carrier:** USPS _(our reading, not quoted from the source)_
- **Restriction type:** restricted _(our reading, not quoted from the source)_
- **Scope:** domestic mail via surface transportation _(our reading, not quoted from the source)_
- **Conditions:** Mailable if qualifies as Limited Quantity surface material and meets conditions; Packaging Instruction 3B must be followed

## What the source says

> 52/pub52apxc_001.htm#ep999476> Appendix C must be followed. Diesel Fuel (NA1993): A combustible liquid with a typical flashpoint between 110&deg; F (43&deg; C) and 190&deg; F (88&deg; C) and is mailable if it qualifies as a Limited Quantity surface material and meets the conditions stated in 343.22 . Packaging Instruction 3B in <https://pe.usps.com/text/pub5

## Source

- https://pe.usps.com/text/pub52/pub52c3_022.htm

Last verified: 2026-08-04. Review by: 2027-08-04.
Part of [Postal shipping restrictions by item category](https://referencesource.org/shipping-restrictions-by-class/).