Standard: UNI 6873
Available sizes: Φ1.5 to Φ4.5 (7 sizes)
| Standard Body | Standard Number |
|---|---|
| GB | GB /T 879.1 |
| DIN | DIN EN ISO 8752 |
| ISO | ISO 8752 |
| UNI | UNI 6873 |
| Size | P | s_max | s_min |
|---|---|---|---|
| Φ1.5 | 2.4 | 2.3 | 1.5 |
| Φ2 | 3.5 | 3.3 | 2.1 |
| Φ2.5 | 4.6 | 4.4 | 2.8 |
| Φ3 | 5.6 | 5.4 | 3.4 |
| Φ3.5 | 8.8 | 8.5 | 5.5 |
| Φ4 | 12.8 | 12.5 | 7.5 |
| Φ4.5 | 14.8 | 14.5 | 8.5 |
Standard corrosion protection for indoor and mild outdoor environments.
Salt spray: 96–200 hours | RoHS compliant (trivalent chromium)
High-performance coating for automotive, marine, and harsh environments.
Salt spray: 720–1500 hours | Recommended for grade 8.8+
Heavy-duty protection for structural and outdoor applications.
Salt spray: 500–1000 hours | Thread tolerance adjustment required
Note for high-strength fasteners (Grade 10.9, 12.9): Electroplating processes require hydrogen embrittlement relief baking (minimum 4 hours at 200°C within 4 hours of plating). Contact our engineering team for grade-specific plating recommendations.
Request detailed technical specifications, material certifications, and availability information for your application requirements. Our engineering team can provide product recommendations, custom specifications, and technical documentation.
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