U.S. imports of All Other Miscellaneous Nonmetallic Mineral Products (NAICS 327999) totaled $83.6M in August 2026, imported from 72 countries.
Importers of All Other Miscellaneous Nonmetallic Mineral Products paid $8.7M in duties in August 2026, an average duty rate of 9.68% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataThe most granular residual category within NAICS 327, this grouping captures specialty mineral articles not elsewhere classified — such as manufactured graphite electrodes, carbon and graphite shapes, mica fabrications, and friction materials — that serve niche but technically demanding roles in steel production, electrical equipment, and high-performance braking systems. Trade flows are often concentrated among a small number of technically capable suppliers, and several product lines within this category have faced antidumping scrutiny. Precise material and form identification is essential because these products scatter across multiple HTS chapters with distinct duty and regulatory treatment.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
2.9K import shipments a month
Graphite electrodes used in electric arc furnace steelmaking have been subject to antidumping duty investigations and orders from certain origins. Given their critical role in domestic steel production, trade-remedy activity in this product line has been closely watched. Importers should check the current status of any active orders with the US Department of Commerce before sourcing.
Customs brokers typically request a detailed technical data sheet specifying the article's carbon or graphite content by weight, its manufacturing method (extruded, molded, or isostatic), intended end use, and physical dimensions. These details determine whether the article classifies as a carbon or graphite electrode, a carbon or graphite brush, or another form — each of which may carry a different HTS heading and duty rate.
National industry 2 of 4 in naics industry 32799
National industry 327999 · $83.6M of $635.9M
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Imports · August 2026
origin
Indonesia and Canada together supply 45% of it. China pays 37.4% duty; Canada <0.1%.
customs district
Census does not publish district detail for this classification system.
destination
Census publishes state breakdowns for NAICS to the 4-digit level only. See NAICS 3279 for those.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$83.6MYoY · free account
Exports
$58.5MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $942.2M of All Other Miscellaneous Nonmetallic Mineral Products and exported $649.3M.
Through August 2026. Source: U.S. Census Bureau.