Standard: EN 28738 - 1992
Available sizes: Φ10 to Φ8 (7 sizes)
| Standard Body | Standard Number |
|---|---|
| GB | GB /T 97.3 |
| DIN | DIN EN 28738 |
| ISO | ISO 8738 |
| Size | P | k_max | k_min | s_max | s_min | ds_max | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|
| Φ10 | 22 | 4 | 4.3 | 22.33 | 34 | 16.6 | 33.38 | 3.7 |
| Φ12 | 24 | 4 | 4.3 | 24.33 | 37 | 19.6 | 36.38 | 3.7 |
| Φ3 | 4 | 0.8 | 0.9 | 4.18 | 8 |
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.
| 0.23 |
| 7.64 |
| 0.7 |
| Φ4 | 6 | 1.6 | 1.8 | 6.18 | 12 | 1.05 | 11.57 | 1.4 |
| Φ5 | 10 | 2.5 | 2.7 | 10.22 | 18 | 3.45 | 17.57 | 2.3 |
| Φ6 | 14 | 3 | 3.3 | 14.27 | 22 | 5.33 | 21.48 | 2.7 |
| Φ8 | 18 | 4 | 4.3 | 18.27 | 28 | 11.3 | 27.48 | 3.7 |
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