Standard: JB /T 14720.2 - 2024
Available sizes: 10 to 8 (5 sizes)
| Size | P | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| 10 | 22 | 28 | 0.8 | 21.5 | 22.7 | 40.9 | 20.5 | 21.2 | 10.7 | 22.5 |
| 12 | 25.1 | 28 | 1 | 24.8 | 26 | 44.4 | 23.9 | 24.6 | 11.9 |
| 25.8 |
| 5 | 6.45 | 14 | 0.2 | 5.95 | 6.58 | 13.5 | 5.9 | 6.15 | 2.6 | 6.4 |
| 6 | 9.65 | 17 | 0.4 | 8.85 | 9.78 | 21 | 8.7 | 8.85 | 4.7 | 9.6 |
| 8 | 15.7 | 20 | 0.6 | 15 | 16.3 | 29 | 14.5 | 15.1 | 7.5 | 15.9 |
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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