Standard: GB /T 2201 - 1991
Available sizes: 10 to 8 (7 sizes)
| Size | P | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|
| 10 | 26 | 35 | 35.033 | 26.013 | 26.021 | 39 | 5 | 20 | 35.017 |
| 12 | 30 | 42 | 42.033 | 30.013 | 30.021 | 46 | 5 | 45 | 42.017 |
| 15 |
| 35 |
| 48 |
| 48.033 |
| 35.016 |
| 35.025 |
| 52 |
| 5 |
| 25 |
| 48.017 |
| 3 | 4 | 8 | 8.019 | 4.008 | 4.012 | 11 | 3 | 10 | 8.01 |
| 4 | 8 | 12 | 12.023 | 8.009 | 8.015 | 15 | 3 | 10 | 12.012 |
| 6 | 12 | 18 | 18.023 | 12.011 | 12.018 | 22 | 4 | 12 | 18.012 |
| 8 | 18 | 26 | 26.028 | 18.011 | 18.018 | 30 | 4 | 16 | 26.015 |
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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