Analysis
HTS 5002.00.00 covers raw silk (not thrown) under heading 5002 (raw silk (not thrown)).
There is no general-rate duty on this line, which puts it with roughly 62% of the 13 tariff lines in chapter 50 that are also free. Chapter 99 measures such as Section 301 or 232 can still apply on top, depending on where the goods come from.
It is the only US line under subheading 5002.00, so the six-digit code used by every Harmonized System country and the eight-digit US line describe the same goods; a foreign tariff or an exporter's invoice showing 5002.00 points straight here.
Census statistics map these goods to NAICS 112990 (All Other Animal Production), the industry a domestic producer of these goods reports under.
The general rate of Free has not changed in any edition of the schedule since Jan 2023.