## Common ground
All options refer to fasteners (nails or ring nails) made from different metals.
## Options at a glance
**7317.00 – Iron/steel base**
- **Defining trait:** Made primarily from iron or steel, the most common and cost-effective material for nails.
- **Typical examples:** Standard construction nails, common ring nails for wood.
- **Best fit when:** The product is plain, uncoated, and used in general building or carpentry.
**7415.10 – Copper head on iron/steel**
- **Defining trait:** Features a copper head while the shaft remains iron or steel; combines strength with corrosion resistance.
- **Typical examples:** Decorative nails for woodwork, antique-style fixtures.
- **Best fit when:** Aesthetic appeal or resistance to tarnish is important, especially in visible applications.
**7415.10 – Copper only**
- **Defining trait:** Entirely made of copper; used where conductivity or corrosion resistance is key.
- **Typical examples:** Roofing nails, electrical grounding fasteners.
- **Best fit when:** The product is fully copper and intended for specialized or decorative use.
**7508.90 – Nickel**
- **Defining trait:** Made of nickel; highly corrosion-resistant and durable.
- **Typical examples:** Marine hardware, high-end fixtures.
- **Best fit when:** Extreme durability or resistance to moisture/chemicals is required.
**7616.10 – Aluminium**
- **Defining trait:** Lightweight and rust-resistant; ideal for non-ferrous applications.
- **Typical examples:** Roofing nails, lightweight construction.
- **Best fit when:** Weight reduction or corrosion resistance in outdoor use is critical.
**7907.00 – Zinc**
- **Defining trait:** Typically used as a coating (galvanized), but here refers to zinc-made fasteners; rare and less common.
- **Typical examples:** Specialized corrosion-resistant fasteners (rare).
- **Best fit when:** The product is explicitly made of zinc, not coated.
## Key differences
| Option | Material | Corrosion Resistance | Weight | Common Use |
|-------|----------|------------------------|--------|------------|
| 7317.00 | Iron/steel | Low | High | General construction |
| 7415.10 (copper head) | Steel shaft + copper head | Medium | Medium | Decorative |
| 7415.10 (copper only) | Copper | High | Medium | Specialized, electrical |
| 7508.90 | Nickel | Very high | Medium | Harsh environments |
| 7616.10 | Aluminium | High | Low | Lightweight, outdoor |
| 7907.00 | Zinc | High | Medium | Rare, specialized |
## How to choose
- Is the nail made of iron or steel? → 7317.00
- Does it have a copper head on a steel shaft? → 7415.10 (copper head)
- Is it fully made of copper? → 7415.10 (copper only)
- Is it made of nickel or used in harsh environments? → 7508.90
- Is it lightweight and used outdoors? → 7616.10
- Is it explicitly made of zinc (not coated)? → 7907.00
## Overlaps & pitfalls
- **Overlaps:** A copper-headed nail could be mistaken for fully copper; clarify material composition.
- **Pitfall:** "Zinc" may refer to galvanized steel, but here it means solid zinc—ensure the product is not coated.
- **Priority:** Use the **main material** (e.g., shaft vs. head) to decide. If unclear, prioritize the base metal