Machined aluminum parts|HTS Code

Machined aluminum parts harmonized system code

Product Overview Machined aluminum parts classified under HTS 7616.99 are finished, solid aluminum articles produced by subtractive machining processes (CNC turning, milling, drilling, tapping, grinding) from wrought or extruded aluminum stock. They exclude castings, forgings and fasteners specifically classified elsewhere. Key characteristics include alloy specification (commonly 6061, 6063, 7075, 2024), dimensional ranges from sub‑millimeter components to multi‑hundred‑millimeter housings, typical dimensional tolerances (precision grade ±0.01 mm to ±0.1 mm), surface roughness requirements (Ra 0.4–3.2 µm), and secondary finishing such as anodizing, passivation or precision deburring. Processing levels cover single‑operation turned parts, multi‑axis milled assemblies, heat‑treated and surface‑finished deliverables. Product classifications within 7616.99 typically encompass precision turned components (shafts, bushings), milled housings and brackets, spacers and standoffs, flanges and couplings, and machined blocks or plates not otherwise specified. Commercial applications span OEM and aftermarket components for industrial machinery, electronic enclosures and fittings, HVAC and refrigeration hardware, marine and general manufacturing spare parts, and retail distribution of replacement components. HTS Code Classification & Trade Specifications HTSUS structure: Chapter 76 — "Aluminum and articles thereof"; Heading 7616 — "Other articles of aluminum"; Subheading 7616.99 (6‑digit code 7616.99) — used for finished aluminum articles not separately specified in other headings. Classification rationale: these are articles of aluminum defined by material and finished form produced by machining; they fall in 7616.99 when no more specific HTS heading (machine/vehicle/aerospace parts) applies. Trade considerations: packaging should prevent corrosion and mechanical damage (palletization, VCI film, polyethylene bags, desiccants, rigid crating for heavy parts), with labeling for part number, unit count, gross/net weight and HTS number. Preservation: anodizing (typical thickness 5–25 µm), temporary oil or VCI coatings, or vacuum/inert gas packing for long sea transit. Documentation and quality requirements: commercial invoice with full 6‑digit HTS, country‑of‑origin marking, material certificates (EN 10204/3.1), CMM inspection records, and compliance with ISO 9001/AS9100, alloy standards (ASTM B221/B209) and tolerance regimes (ISO 2768; typical ±0.01–±0.2 mm).

Machined aluminum parts Chapter Note