1. What’s the recommended material for extreme outdoor longevity?
304 Stainless Steel or heavy galvanized steel (zinc ≥70μm) is advised, meeting ISO 9227 salt spray standards.
2. Which diameters and lengths are standard?
Most common: 2.0–2.5mm diameter, 30–40mm legs, with arc widths of 15–20mm. Larger custom sizes are fabricated by CNC for specialty needs.
3. What is the typical tensile strength and why does this matter?
Not less than 520 MPa. Higher tensile U shape Nails ensure deeper penetration and superior holding in tough substrates.
4. What installation standards apply in construction/fencing?
Installation per ASTM F1667 and local building codes; spacing and driving depth must ensure at least 70% leg penetration.
5. How do I select surface treatment for marine/coastal applications?
Recommend hot-dip galvanizing (≥70μm zinc) or PVC coating. Both provide >1,000-hour salt spray protection.
6. Are ISO/ANSI certificates available, and are they necessary?
Yes, all U shape Nails are supplied with ISO 898-1, EN 10218, and ANSI/ASTM documentation; critical for state tender projects.
7. What's the shelf life and corrosion-free guarantee of your product?
Up to 10–15 years outdoors under standard exposure; 12-month factory warranty against defects and ≥96% corrosion-free guarantee.