Standard: ISO 8744
Available sizes: (Φ1) to Φ3 (5 sizes)
| Standard Body | Standard Number |
|---|---|
| GB | GB /T 13829.5 |
| DIN | DIN EN ISO 8744 |
| ISO | ISO 8744 |
| Size | P | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| (Φ1) | 1.5 | +0.05 | 0.05 | 1 | 1.475 |
| 0.2 |
| 3 |
| 4 |
| 0.35 |
| 2 |
| Φ1.5 | 2.5 | ±0.05 | 0.19 | 1 | 2.475 | 0.34 | 3 | 4 | 0.49 | 2 |
| Φ2 | 3.5 | ±0.05 | 0.27 | 1 | 3.425 | 0.47 | 3 | 4 | 0.67 | 2 |
| Φ2.5 | 5 | ±0.05 | 0.47 | 1 | 4.925 | 0.67 | 3 | 4 | 0.87 | 2 |
| Φ3 | 7 | ±0.05 | 0.69 | 1 | 6.91 | 0.94 | 3 | 4 | 1.19 | 2 |
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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