Classification generally follows the principle of the part's principal use or design specificity. If a component is identifiable as suitable for use solely or principally with a particular machine type (e.g., a knitting machine needle bed), it is classified with that machine's parts heading. Generic or interchangeable parts may require a binding ruling from CBP to confirm the correct subheading.

Yes. Many textile machinery parts sourced from China are subject to Section 301 tariffs. Importers should confirm the applicable HTS subheading and check the current Section 301 product list, as coverage and exclusion status can change. Working with a licensed customs broker is advisable to assess exposure before shipment.