S-Glass Continuous Filament Bulk
High-strength S-glass continuous filaments in bulk packaging for aerospace composite reinforcement. Classified under HTS 7019.90.51.20 as other glass fibers in bulk, distinct from yarns or woven forms. Includes fused silica variants per tariff schedule definitions.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If sized for use in composites as continuous filaments
Continuous glass filaments specifically sized for composites have dedicated subheadings outside bulk.
If blended with significant non-glass mineral content
Products exceeding glass wool composition limits per chapter notes classify as exfoliated vermiculite or similar.
If other bulk forms not specifically '51.20'
Finer statistical breakout within 7019.90.50 for non-specified bulk glass fibers.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Document tensile strength specs to justify S-glass classification; use non-woven bulk packaging
• Comply with REACH-like certifications for industrial fibers
• Avoid any twisting that could classify as yarn under 7019.10
Related Products under HTS 7019.90.51.20
E-Glass Bulk Fiber Pack
Unchopped E-glass fibers supplied in bulk form, typically used for reinforcement in composites and fiberglass manufacturing. This product falls under HTS 7019.90.51.20 as glass fibers in bulk, not processed into yarn, rovings, or fabrics. It meets the general definition of glass fibers including those with high silica content as per chapter notes.
C-Glass Bulk Roving Fiber
Corrosion-resistant C-glass fibers in bulk form, ideal for chemical tank linings and marine applications. This is 'other' glass fibers in bulk under HTS 7019.90.51.20, pre-processing stage before yarn formation. Excludes lead crystal or coated variants.
AR-Glass Bulk Fibers
Alkali-resistant AR-glass fibers in bulk for concrete reinforcement and geotechnical applications. Falls under HTS 7019.90.51.20 as glass fibers in bulk, meeting fused silica inclusion and excluding worked glass per chapter notes. Supplied loose for chopping or mixing.
High-Silica Glass Wool Bulk Pack
Glass wool with over 60% silica content supplied in bulk for insulation and filtration media production. Precisely matches HTS 7019.90.51.20 for bulk glass fibers including qualifying glass wool per chapter note (a). Not formed into mats or boards.
Basalt-Impregnated Glass Fiber Bulk
Hybrid glass fibers blended with basalt in bulk form for fire-resistant composites. Still classified as glass fibers in bulk under HTS 7019.90.51.20 if predominant glass composition. Excludes worked processing like cutting to shape per chapter notes.
Fused Quartz Bulk Fibers
Pure fused quartz glass fibers in bulk for high-temperature applications like fiber optics preforms. Explicitly included as 'glass' throughout tariff schedule per chapter note; bulk form fits HTS 7019.90.51.20 perfectly. Not annealed or cut to shape.