Analysis
HTS 4007.00.00 covers vulcanized rubber thread and cord under heading 4007 (vulcanized rubber thread and cord).
Goods from countries without normal trade relations pay the column 2 rate of 35% instead of nothing, so origin decides between free entry and a 35% duty.
There is no general-rate duty on this line, which puts it with roughly 39% of the 142 tariff lines in chapter 40 that are also free. Duty-free at the general rate does not rule out additional duties under Chapter 99, such as Section 301 or Section 232 measures, which depend on the country of origin.
It is the only US line under subheading 4007.00, 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 4007.00 points straight here.
Census statistics map these goods to NAICS 326299 (All Other Rubber Product Manufacturing), an industry of 650 US establishments employing 32,409 people, the industry a domestic producer of these goods reports under.