NAICS 31599 groups accessories by production activity — establishments primarily making wearable add-ons rather than full garments. HTS classification, by contrast, is driven by the article's material, construction, and function, so a single NAICS establishment may produce goods that span multiple HTS chapters and face different duty rates.

NAICS codes inform but do not solely determine the domestic industry definition in ITC proceedings. The ITC defines the domestic like product based on HTS scope and physical characteristics; a petitioner would need to demonstrate that its production aligns with the specific imported articles at issue, which may be a subset of the broader NAICS 31599 group.