Cotton-Core Safety Fuse
Traditional black powder safety fuse with a cotton core impregnated with gunpowder, wrapped in multiple textile layers for waterproofing and durability. Classified under HTS 3603.10.00.00 for its role as a low-explosive time-delay fuse in demolition and quarrying. Burn speed is approximately 35-45 seconds per meter.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If sold in consumer firework kits
Fuses for display fireworks classify under heading 3604, not safety fuses.
If bundled with percussion caps
Assemblies with caps become igniters under other 3603 subheadings.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Provide burn rate test certificates from accredited labs to avoid reclassification as fireworks
• ATF Form 6 required; ensure importer is registered explosives dealer
• Avoid mixing with detonating cord in shipments to prevent hazardous combination rules
Related Products under HTS 3603.10.00.00
Visco Safety Fuse
A slow-burning safety fuse made from visco powder encased in a flexible textile or plastic sheath, designed for reliable ignition delay in blasting operations. It falls under HTS 3603.10.00.00 as a safety fuse used to initiate detonators in mining and construction explosives. The fuse burns at a consistent rate, typically 1 foot per 30-40 seconds, ensuring safe standoff distances.
Shock Tube Safety Fuse
A non-explosive plastic tube filled with reactive powder that transmits a low-energy shock wave to initiate detonators remotely. Though technically a signal tube, it's used interchangeably with safety fuses in mining under HTS 3603.10.00.00. Provides minimum run-up distance with high reliability.
Instantaneous Safety Fuse
High-speed safety fuse variant burning at over 100 m/s for rapid sequential blasting in tunnel construction. Made with reinforced gunpowder core and polymer coating for moisture resistance. HTS 3603.10.00.00 covers this as a specialized safety fuse for industrial detonations.
Waterproof Safety Fuse
Safety fuse with multiple wax-impregnated textile layers and plastic overwrap for underwater and wet environment blasting in civil engineering projects. Consistent 40-second-per-meter burn rate qualifies it under HTS 3603.10.00.00. Ideal for dam construction and marine demolition.