Standard: JB /T 14720.1 - 2024
Available sizes: 10 to 8 (6 sizes)
| Size | P | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| 10 | 22 | 22 | 0.8 | 21.5 | 22.7 | 38.5 | 20.5 | 21.2 | 13.5 | 22.5 |
| 12 | 27.8 | 30 | 1 | 27.4 | 28.6 | 50.3 | 23.2 | 24.3 | 17 | 28.5 |
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.
| 16 | 34.3 | 33 | 1 | 34.3 | 35.6 | 61.3 | 29 | 30.4 | 20.7 | 35.6 |
| 5 | 6.45 | 7 | 0.2 | 5.95 | 6.58 | 12.1 | 5.9 | 6.15 | 3.4 | 6.4 |
| 6 | 9.65 | 12 | 0.4 | 8.85 | 9.78 | 18.1 | 8.7 | 8.85 | 5.6 | 9.6 |
| 8 | 15.7 | 16 | 0.6 | 15 | 16.3 | 26.9 | 14.5 | 15.1 | 9.5 | 15.9 |
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