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HTSUS, United States

7325.91.00.00

Grinding balls and similar articles for mills

Classification path

  1. Other cast articles of iron or steel
  2. Other
  3. Grinding balls and similar articles for mills

Rates of duty

General (MFN)
2.9%
Column 2Cuba, North Korea, Russia, Belarus
45%
Unit of quantity
kg

Trade agreement rates

FreeGSP (lapsed since Dec 31, 2020), U.S.-Australia FTA, U.S.-Bahrain FTA, U.S.-Chile FTA, U.S.-Colombia TPA, AGOA (authorized through Dec 31, 2026), E, U.S.-Israel FTA, U.S.-Jordan FTA, U.S.-Korea FTA, U.S.-Morocco FTA, U.S.-Oman FTA, CAFTA-DR, U.S.-Panama TPA, U.S.-Peru TPA, USMCA, U.S.-Singapore FTA

Related lines in heading 7325

About heading 7325

Other cast articles of iron or steel

Heading 7325 covers articles of iron or steel that are cast, not forged or fabricated from sheet or bar. It is split first by whether the cast iron is nonmalleable (7325.10, mainly ground and utility hardware such as covers, frames and boxes) or falls in the residual Other group. The Other group separates grinding balls and similar mill articles (7325.91) from all remaining cast articles, which are divided between cast iron (7325.99.10) and other cast material such as cast steel (7325.99.50).

Full guide to heading 7325

Products in this heading

  • Cast iron manhole covers with rings and frames
  • Catch basin grates and frames
  • Cleanout covers and frames for drains
  • Cast iron valve and service boxes
  • Cast iron meter boxes
  • Cast steel grinding balls for ball mills
  • Cast iron counterweights and machine bases not provided for elsewhere
  • Miscellaneous cast steel hardware blanks

Frequently asked questions

What is the HTS code for a cast iron manhole cover and frame?

Cast iron manhole covers, rings and frames of nonmalleable cast iron are classified under 7325.10.00.10. The general (MFN) rate for that line is Free.

What is the duty on cast grinding balls for mills?

Grinding balls and similar articles for mills fall under 7325.91.00.00. The general (MFN) rate for that line is 2.9%.

How do I classify a cast iron meter box?

Meter boxes of nonmalleable cast iron are classified under 7325.10.00.35, which carries a general (MFN) rate of Free. If the box were made of cast steel instead, it would fall to the residual line 7325.99.50.00 at a general (MFN) rate of 2.9%.

Source: USITC Harmonized Tariff Schedule, retrieved October 21, 2026.

HTS 7325.91.00.00: Grinding balls and similar articles for mills, 2.9% duty | HTSBase