Cast fittings (730711, 730719) are formed by pouring molten metal into a mold and are identifiable by their granular fracture surface and lack of directional grain. Wrought fittings (730721–730799) are mechanically worked from bar, tube, or plate stock and have a fibrous grain structure. The manufacturing process, not the shape, determines which group applies.

Antidumping and countervailing duty orders on iron and steel pipe fittings are scope-specific: they define covered products by material, size, and manufacturing method. Not every subheading under 7307 is necessarily covered by a given order. Importers should review the current order scope language and confirm with a licensed customs broker whether their specific fitting type and origin fall within scope.