Standard: DIN 1481 - 1978
Available sizes: Φ1 to Φ4 (7 sizes)
| Standard Body | Standard Number |
|---|---|
| GB | GB /T 879.1 |
| DIN | DIN EN ISO 8752 |
| ISO | ISO 8752 |
| UNI | UNI 6873 |
| Size | P | k_max | k_min | s_max | s_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|
| Φ1 | 0.25 | 0.3 | 0.79 | 1.7 | 1.8 | 1.1 | 1.58 |
| Φ1.5 | 0.4 | 0.5 | 2.19 | 2.8 | 2.9 | 1.8 | 4.38 |
| Φ2 | 0.6 | 0.75 | 4.53 | 3.8 | 4 | 2.3 | 9.06 |
| Φ2.5 |
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.
| 0.8 |
| 1 |
| 7.68 |
| 4.9 |
| 5.1 |
| 2.9 |
| 15.36 |
| Φ3 | 1.2 | 1.25 | 13.02 | 6.4 | 6.7 | 3.9 | 26.04 |
| Φ3.5 | 2 | 2 | 35.08 | 10.5 | 10.8 | 6.5 | 70.16 |
| Φ4 | 2 | 2.5 | 57.55 | 13.5 | 13.8 | 8.5 | 115.1 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.