Why Our Duplex Nails are the Industry Standard
- Easy-Removal Design: The secondary head remains exposed above the wood surface, allowing for 50% faster disassembly with a claw hammer or pry bar.
- High-Tensile Q195 Steel: Manufactured from premium low-carbon steel, our formwork nails resist bending under the heavy lateral pressure of wet concrete.
- Precision Diamond Point: Features a sharp 60-degree point for effortless penetration, reducing wood splitting and installer fatigue.
- Polished Finish: Every batch is tumbled and polished to ensure zero oil residue and smooth handling on the job site.
Technical Specifications & Size Chart
| Size (Penny) | Length (Inch) | Shank Diameter (Gauge) | Nails per Lb (Approx) |
|---|---|---|---|
| 6d | 1-3/4″ | 11-1/2 Gauge (2.87mm) | 155 |
| 8d | 2-1/4″ | 10-1/4 Gauge (3.25mm) | 95 |
| 10d | 2-3/4″ | 9 Gauge (3.76mm) | 65 |
| 16d | 3″ | 8 Gauge (4.11mm) | 45 |
| 20d | 3-1/2″ | 6 Gauge (4.88mm) | 30 |
| 30d | 4″ | 5 Gauge (5.26mm) | 23 |
Wholesale Supply for Construction Material Importers
As a specialized duplex nails exporter, we supply major infrastructure projects across the USA, Middle East, and Southeast Asia. Our iron wire double head nails are produced on fully automated machines to ensure ±0.03mm precision on every batch. By purchasing wholesale duplex nails directly from our factory, B2B buyers can achieve 15-20% cost savings while securing a stable supply of building materials for high-volume construction seasons.
We offer full OEM branding options, including customized retail packaging (1kg/5kg boxes) or industrial bulk cartons (25kg/50lb). Our moisture-proof palletized shipping ensures your cargo arrives in perfect condition. With a monthly capacity of 600 Metric Tons, we are ready to handle your large-scale requirements with a standard lead time of 15-25 days.
Frequently Asked Questions (FAQ)
Q1: Why are duplex nails used in concrete formwork?
A: They allow for a permanent hold during the concrete pour, but the second head makes them incredibly easy to pull out, allowing the timber forms to be reused multiple times without splitting.
Q2: Can I get these nails in a galvanized finish?
A: Yes, while bright polished is standard for temporary use, we also offer electro-galvanized duplex nails for projects requiring extra corrosion resistance.
Q3: Do you support custom lengths?
A: Absolutely! We can manufacture custom shank lengths and head spacings to meet your specific regional construction standards.
Get Your Factory-Direct Quote Today
Looking for Duplex Nails at wholesale prices? Contact our sales team for a Free Sample Kit and our 2026 bulk price list.
