Standard: GB /T 12617.1 - 2006
Available sizes: Φ2.4 to Φ3.2 (3 sizes)
| Standard Body | Standard Number |
|---|---|
| GB | GB /T 12617.1 |
| DIN | DIN EN ISO 15978 |
| ISO | ISO 15978 |
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Φ2.4 | 3.08 | 550 | 550 |
| 1.3 |
| 2 |
| 2.85 |
| 6.3 |
| L(max)+3.5 |
| 400 |
| 5.4 |
| 25 |
| Φ3 | 4.08 | 1250 | 1200 | 1.7 | 2.45 | 3.85 | 8.4 | L(max)+4 | 850 | 6.9 | 27 |
| Φ3.2 | 5.08 | 2150 | 2000 | 2.1 | 2.95 | 4.85 | 10.5 | L(max)+4.5 | 1400 | 8.7 | 27 |
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.
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.