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SITCSection 6
U.S. imports of nonwired float glass & surface ground or polished glass sheets (SITC 66441) totaled $27.6M in April 2026, traded with 42 countries.
Importers of Nonwired Float Glass & Surface Ground or Polished Glass Sheets paid $2.9M in duties in April 2026 — an effective duty rate of 14% on $21.5M in dutiable value, based on actual customs collections rather than the published tariff schedule. Nonwired Float Glass & Surface Ground or Polished Glass Sheets imports of $27.6M in April 2026 ran 19% above the year-to-date monthly average of $23.1M.
Last updated: April 2026 dataFloat glass — produced by floating molten glass on a bed of molten tin — dominates global flat glass supply and is the standard substrate for architectural glazing, automotive windshields, solar panels, and display glass. The nonwired designation confirms the absence of embedded wire mesh, which is a safety and optical requirement for most high-clarity applications. Surface ground or polished variants in this heading achieve tighter thickness tolerances and superior optical flatness, making them critical inputs for mirror production, precision optics, and high-specification curtain wall systems.
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Standard architectural float glass is traded in thicknesses from approximately 2 mm to 19 mm, with thinner gauges used in electronics and display applications and thicker gauges in structural and blast-resistant glazing. Thickness tolerance and flatness specifications vary by end-use and are typically stated in purchase contracts referencing ASTM or EN standards.
Both fall within this heading, but surface ground or polished glass has undergone additional mechanical finishing to achieve superior flatness and parallelism. This distinction matters for end-users in mirror manufacturing and precision optics, where residual surface waviness from the float process would be unacceptable, and it may affect the applicable duty rate at the tariff-line level.
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Monthly import values over time