Standard: GB /T 2205 - 1991
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 10 | 22.02 | 45 | 6 | 26 | 20 | 21.959 | 36 | 60 | 4 | 30 |
| 3 | 4.01 | — | 3 | 6 | — | 3.978 | 8 | 30 | 2 | 8 |
| 4 | 8.013 | — | 3 | 8 | — | 7.972 | 12 | 30 | 2 | 12 |
| 6 | 12.016 | — | 4 | 12 | — | 11.966 | 16 | 40 | 3 | 16 |
| 8 | 18.016 | 35 | 6 | 18 | 14 | 17.966 | 22 | 50 | 4 | 22 |
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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