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USPS Packaging Instruction 1B

Safety Fuse

Safety fuses consist of a core of black powder overspun with yarns, waterproofing compounds, and/or tapes. A safety fuse assigned identification number UN0105 and classed as a Division 1.4S explosive may be mailed only as permitted in 341.22b and when properly packaged as follows.

Proper Shipping Name

ID Number

Required Authorization

Mailability

Required Packaging

Primary Receptacle
Cushioning Material
Outer Packaging
Marking
Documentation

Note: Full responsibility rests with the mailer to comply with Bureau of Alcohol, Tobacco, Firearms, and Explosives (BATFE) regulations before mailing. A legible photocopy of the Product Classification Manager’s approval letter must be presented by the mailer to the Postal Service acceptance clerk at the time of mailing.