Standard: JB /T 14720.2 - 2024
Available sizes: 10 to 8 (5 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 10 | 23.1 | 34.2 | 23.7 | 27.5 | 28.3 | 23.7 | 34.2 | 35.8 | 23.1 | 34.9 | 34.7 |
| 12 | 26 | 39.4 | 26.7 | 31.2 | 32.4 | 26.7 | 39 | 41.5 |
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.
| 26 |
| 40 |
| 39.5 |
| 5 | 6.5 | 10.21 | 6.78 | 8.1 | 8.3 | 6.73 | 10.21 | 11.22 | 6.5 | 10.39 | 10.37 |
| 6 | 9.53 | 15.22 | 9.91 | 10.92 | 11.68 | 9.78 | 14.99 | 16.19 | 9.6 | 15.24 | 15.33 |
| 8 | 16.5 | 24.6 | 16.9 | 21.5 | 22.2 | 16.9 | 24.7 | 26.2 | 16.5 | 25.7 | 25.2 |
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