## Common ground
All options refer to carding tacks—small, pointed fasteners used in textile processing or similar industrial applications.
## Options at a glance
**7317.00 – Made of iron or steel**
- **Defining trait:** Primary material is iron or steel, commonly used for durability and cost-effectiveness.
- **Typical examples:** Standard industrial tacks for carding machines in cotton processing.
- **Best fit when:** The product is strong, rust-resistant (with coating), and intended for heavy-duty use.
**7415.10 – Nails, tacks, drawing pins... with heads of copper**
- **Defining trait:** Features a copper head, while the shaft may be iron/steel; distinguishes by material composition of the head.
- **Typical examples:** Tacks with decorative or corrosion-resistant copper heads for specialized textile tools.
- **Best fit when:** The head is visibly copper and not just plated; used where conductivity or appearance matters.
**7415.10 – Made of copper**
- **Defining trait:** Entirely made of copper, offering high corrosion resistance and electrical conductivity.
- **Typical examples:** Copper tacks for use in sensitive environments or with conductive materials.
- **Best fit when:** The entire tack is solid copper, not just the head.
**7508.90 – Made of nickel**
- **Defining trait:** Constructed from nickel, known for high corrosion resistance and strength.
- **Typical examples:** Tacks used in harsh chemical or marine environments.
- **Best fit when:** The product is highly resistant to wear, oxidation, or moisture.
**7616.10 – Made of aluminium**
- **Defining trait:** Lightweight and corrosion-resistant due to aluminum’s natural oxide layer.
- **Typical examples:** Tacks used in lightweight machinery or where weight matters.
- **Best fit when:** The product is light, non-magnetic, and resistant to rust.
**7907.00 – Made of zinc**
- **Defining trait:** Made from zinc, often used for galvanization or sacrificial protection.
- **Typical examples:** Zinc-coated tacks (galvanized) or pure zinc tacks in low-stress applications.
- **Best fit when:** The product is coated or made of zinc for anti-corrosion purposes.
## Key differences
| Option | Material | Head Material | Corrosion Resistance | Weight |
|--------|----------|----------------|------------------------|--------|
| 7317.00 | Iron/Steel | N/A | Low (unless coated) | High |
| 7415.10 (copper head) | Iron/Steel shaft | Copper head | Medium | Medium |
| 7415.10 (copper) | Copper | Copper | High | Medium |
| 7508.90 | Nickel | N/A | Very high | Medium-High |
| 7616.10 | Aluminium | N/A | High | Low |
| 7907.00 | Zinc | N/A | Medium (coated) | Medium |
## How to choose
- Is the entire tack made of copper? → 7415.10 (copper)
- Does it have a copper head but steel shaft? → 7415.10 (copper head)
- Is it primarily iron or steel? → 7317.00
- Is it made of nickel? → 7508.90
- Is it lightweight and non-magnetic? → 7616.10
- Is it zinc-coated or pure zinc? → 7907.00
## Overlaps & pitfalls
- **Overlap:** A copper-headed tack (iron shaft) could fit both 7415.10 codes—clarify if the head is copper or the whole item is.
- **Pitfall:** "Made of" vs. "coated with"—zinc-coated tacks are not necessarily 7907.00 unless pure zinc.
- **Priority:** Choose based on the **main material** of the tack, not just surface features