5006

Analysis

Heading 5006 of the Harmonized Tariff Schedule covers silk yarn and yarn spun from silk waste, put up for retail sale; silkworm gut. It has 2 tariff lines.

Every one of its 2 tariff lines is duty-free at the general rate, so classification within the heading affects statistics and Chapter 99 measures rather than the base duty.

Its lines are 5006.00.10 for containing 85 percent or more by weight of silk or silk… (duty-free) and 5006.00.90 for silk yarn and yarn spun from silk waste, put up for retail… (duty-free).

Its median rate of duty-free sits at the 31st percentile of the headings in chapter 50.

By Census's concordance, most of its statistical lines are made by Fiber, Yarn, and Thread Mills (313110). Those are the NAICS industries a US producer of these goods would report under.

The heading text decides whether a product belongs here at all (General Rule of Interpretation 1); the subheadings and lines below it only apply once that is settled. Section and chapter notes can override the heading wording, so read them for borderline goods.