Standard: JB /T 14725 - 2024
Available sizes: M2.5 to M4 (4 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M2.5 | 0.5 | 0.85 | 1.15 | 2.2 | 1.95 | 5.1 | 4.92 | 1 | 0.8 | 3.6 | 0.1 |
| M3 | 0.7 | 0.85 | 1.15 | 2.5 | 2.25 | 6.6 | 6.38 |
| 1.2 |
| 1 |
| 4.7 |
| 0.2 |
| M3.5 | 1 | ı.40 | 1.8 | 3.8 | 3.5 | 9.4 | 9.18 | 1.4 | 1.2 | 6.8 | 0.25 |
| M4 | 1 | 1.4 | 1.8 | 3.8 | 3.5 | 9.4 | 9.18 | 1.4 | 1.2 | 7.8 | 0.25 |
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.
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