## Common ground
Both options refer to hinges, mechanical devices that allow two parts to rotate relative to each other.
## Options at a glance
**3926.90 – Made of plastic material**
- **Defining trait:** Constructed primarily from synthetic polymer materials like polypropylene or nylon.
- **Typical examples:** Plastic cabinet hinges, low-load window hinges, lightweight door fittings.
- **Best fit when:** The hinge is non-metallic, lightweight, corrosion-resistant, and used in low-stress applications (e.g., furniture, consumer electronics).
**8302.10 – Made of base metal**
- **Defining trait:** Constructed from ferrous or non-ferrous metals such as steel, iron, brass, or aluminum.
- **Typical examples:** Steel door hinges, heavy-duty gate hinges, industrial machinery fittings.
- **Best fit when:** The hinge is strong, durable, and designed for high-load or outdoor use (e.g., exterior doors, gates, machinery).
## Key differences
| Feature | 3926.90 (Plastic) | 8302.10 (Base Metal) |
|---------------------|--------------------------|----------------------------|
| Material | Synthetic polymer | Iron, steel, brass, etc. |
| Load capacity | Low to moderate | High |
| Corrosion resistance| High | Moderate to low (unless coated) |
| Typical use | Furniture, light fixtures| Doors, gates, industrial |
## How to choose
- Is the hinge made of plastic or polymer? → 3926.90
- Is the hinge made of steel, iron, brass, or aluminum? → 8302.10
## Overlaps & pitfalls
A hinge may combine materials (e.g., metal pins in a plastic body), but classification depends on the **primary material** by weight or function. If unsure, prioritize the dominant structural material. No clear priority rule is given—use the product’s main functional material as the deciding factor