Parts of Machinery for Working Rubber or Plastics

Barrel screws are specifically enumerated under 8477904501 regardless of whether they serve an injection-molding machine or an extruder. However, other structural parts — such as bases, beds, platens, and clamp cylinders — are split between lines dedicated to injection-molding machines (8477902540) and a residual NESOI line (8477902580), so the parent machine type does matter for those components.

Parts must be classifiable as suitable for use solely or principally with a specific machine to be classified under heading 8477 rather than as a general hydraulic component under heading 8412 or 8484. If the cylinder is a standard commercial item used across multiple machine types, it may not qualify as a dedicated part of plastics machinery. Importers should obtain manufacturer documentation confirming the part's design specificity before classification.