Standard: NF E 25
Available sizes: Φ1.4 to Φ5 (7 sizes)
| Standard Body | Standard Number |
|---|---|
| GB | GB /T 13829.9 |
| DIN | DIN EN ISO 8747 |
| ISO | ISO 8747 |
| Size | P | k_max | k_min | s_max | s_min | ds_max | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|
| Φ1.4 | 1.6 | 0.48 | 1.7 | 1.55 | 3 | 1.7 | 2.6 | 1.75 |
| Φ1.6 | 2.5 | 0.75 | 2.7 | 2.425 | 4.6 | 2.65 | 4.2 | 2.75 |
| Φ2 | 4 | 1.2 | 4.25 | 3.9 | 7.25 |
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.
| 4.2 |
| 6.75 |
| 4.3 |
| Φ2.5 | 6 | 1.8 | 6.3 | 5.9 | 10.8 | 6.25 | 10.2 | 6.35 |
| Φ3 | 10 | 3 | 10.35 | 9.85 | 16 | 10.3 | 14.9 | 10.4 |
| Φ4 | 16 | 4.8 | 16.4 | 15.8 | 26 | 16.3 | 23.7 | 16.5 |
| Φ5 | 20 | 6 | 20.5 | 19.8 | 31.5 | 20.4 | 30.7 | 20.6 |
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