Standard: GB /T 12615.4 - 2004
Available sizes: Φ3.2 to Φ4 (2 sizes)
| Standard Body | Standard Number |
|---|---|
| GB | GB /T 12615.4 |
| DIN | DIN EN ISO 16585 |
| ISO | ISO 16585 |
| Size | P | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| Φ3.2 | 4.08 | 6500 | 1.7 | 2.75 | 3.85 |
| 8.4 |
| 3000 |
| 3500 |
| 6.9 |
| 25 |
| Φ4 | 6.48 | 16000 | 2.7 | 3.9 | 6.25 | 13.4 | 6000 | 8000 | 11.6 | 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.
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