Standard: GB /T 13829.3
Available sizes: Φ1.4 to Φ5 (7 sizes)
| Standard Body | Standard Number |
|---|---|
| EN | EN 28746 |
| GB | GB /T 13829.8 |
| DIN | DIN EN ISO 8746 |
| ISO | ISO 8746 |
| Size | P | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|
| Φ1.4 | 1.6 | 1.1 | 0.9 | 1.55 | 3.0 | 0.48 | +0.05，0 | 2.6 | 1.6 |
| Φ1.6 | 2.5 | 1.6 | 1.4 | 2.425 | 4.6 | 0.75 | ±0.05 | 4.2 | 2.4 |
| Φ2 | 4 |
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.
| 2.55 |
| 2.25 |
| 3.9 |
| 7.25 |
| 1.2 |
| ±0.05 |
| 6.75 |
| 3.8 |
| Φ2.5 | 6 | 3.75 | 3.45 | 5.9 | 10.8 | 1.8 | ±0.05 | 10.2 | 5.7 |
| Φ3 | 10 | 7.4 | 6.5 | 9.85 | 16.0 | 3 | ±0.1 | 14.9 | 8 |
| Φ4 | 16 | 10.9 | 10.0 | 15.8 | 25.0 | 4.8 | ±0.1 | 23.7 | 13 |
| Φ5 | 20 | 13.9 | 13.0 | 19.8 | 32.0 | 6 | ±0.1 | 30.7 | 16.5 |
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