SITCSection 6

Nonwired Float Glass & Surface Ground or Polished Glass Sheets

Name: Nonwired Float Glass & Surface Ground or Polished Glass Sheets (SITC 66441) -- U.S. Export Data
Creator: U.S. Census Bureau
License: https://www.census.gov/about/policies/open-gov/open-data.html

SITC 66441Basic heading5-digit

U.S. imports · July 2026: $23.3M; YTD $174.4M

U.S. exports · July 2026: $33.3M

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Balance · July 2026: Loading the trade balance

U.S. exports of nonwired float glass & surface ground or polished glass sheets (SITC 66441) totaled $33.3M in July 2026.

Importers of Nonwired Float Glass & Surface Ground or Polished Glass Sheets paid $2.5M in duties in July 2026 — an effective duty rate of 14% on $18.1M in dutiable value, based on actual customs collections rather than the published tariff schedule.

Last updated: July 2026 data

Float 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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1.3K shipments/mo

12-month trend

ImportsExports

Imports

$23.3MYoY · Pro

Exports

$33.3MYoY · Pro

12-mo low · imports

YoY · Pro

$38.2M$0

June 2025December 2025July 2026

Through July 2026. Source: U.S. Census Bureau.

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Basic heading 223 of 766 in section 6

Share of section 6 imports0.09%

Basic heading 66441 · $23.3M of $26.7B

Where it comes from, where it lands, what it pays

Exports · July 2026

Countries

destination

Canada and Mexico together take 87% of it.

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Districts

customs district

Census does not publish district detail for this classification system.

States

origin

Census does not publish state detail for this classification system.

Ports

entry

Census does not publish port detail for this classification system.

Frequently Asked Questions

What thickness ranges are commercially significant for imported nonwired float glass sheets?

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.

How does the classification of surface ground or polished glass differ from standard float glass in practice?

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.