Standard: GB /T 1972
Available sizes: 10 to 8 (8 sizes)
| Size | P | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|
| 10 | 1 | 0.3 | 14 | 7.2 | 813 | 0.711 | 0.8 | 1.1 |
| 12.5 | 1 | 0.4 | 18 | 9.2 | 1250 | 1.48 | 1 | 1.4 |
| 14 | 2 | 0.5 | 22.5 | 11.2 | 1950 | 2.94 | 1.25 | 1.75 |
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 | 2 | 0.65 | 28 | 14.2 | 2850 | 5.39 | 1.5 | 2.15 |
| 18 | 2 | 0.8 | 35.5 | 18.3 | 5190 | 11.4 | 2 | 2.8 |
| 20 | 2 | 1 | 45 | 22.4 | 7720 | 23.5 | 2.5 | 3.5 |
| 22.5 | 2 | 1.1 | 50 | 25.4 | 12000 | 34.3 | 3 | 4.1 |
| 8 | 1 | 0.25 | 10 | 5.2 | 329 | 0.225 | 0.5 | 0.75 |
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