49 CFR 172 Special Provision 103 (Numeric Codes)

These provisions are multi-modal and apply to bulk and non-bulk packagings.

Code	103
Description	Detonators which will not mass detonate and undergo only limited propagation in the shipping package may be assigned to 1.4B classification code. Mass detonate means that more than 90 percent of the devices tested in a package explode practically simultaneously. Limited propagation means that if one detonator near the center of a shipping package is exploded, the aggregate weight of explosives, excluding ignition and delay charges, in this and all additional detonators in the outside packaging that explode may not exceed 25 grams.
HazMat with this Code	UN 0361 - Detonator assemblies, non-electric, for blasting UN 0365 - Detonators for ammunition UN 0255 - Detonators, electric, for blasting UN 0267 - Detonators, non-electric, for blasting