Heading 5204: Cotton sewing thread, whether or not put up for retail sale:

From Chapter 52: Chapter 52

HTS Codes (10-Digit)

HTS Code Description General Duty
5204110000
Not put up for retail sale Containing 85 percent or more by weight of cotton (200)
4.4%
5204190000
Not put up for retail sale Other (200)
4.4%
5204200000
Cotton sewing thread, whether or not put up for retail sale Put up for retail sale (200)
4.4%