HTS code 9902.12.86 covers "Monofilament yarn of nylon, of 53 decitex or more but not over 58 decitex, with no cross-sectional dimension exceeding 1 mm; untwisted or with twist of fewer than 5 turns/m, not put up for retail sale, fully oriented; the foregoing with consistent diameter to be suitable for silk-screening (provided for in subheading 5402.45.90) " under the US Harmonized Tariff Schedule. This is the official duty rate charged by US Customs when this product is imported into the United States, sourced directly from the U.S. International Trade Commission and refreshed daily.