Standard: GB /T 2203 - 1991
Available sizes: 1 to 7 (7 sizes)
| Size | P | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 6 | 6.023 | 6.015 | 3 | 14 | 22 | 7 | 6 | 12 |
| 2 | 8 | 8.028 | 8.019 | 6 | 18 | 28 | 7 | 8 | 14 |
| 3 | 10 |
| 10.028 |
| 10.019 |
| 8 |
| 22 |
| 34 |
| 8 |
| 10 |
| 16 |
| 4 | 14 | 12.034 | 12.023 | 10 | 24 | 36 | 9 | 12 | 18 |
| 5 | 18 | 15.034 | 15.023 | 14 | 26 | 40 | 10 | 15 | 22 |
| 6 | 20 | 12.034 | 12.023 | 18 | 18 | 32 | — | 12 | — |
| 7 | 20 | 12.034 | 12.023 | 18 | 28 | 42 | — | 12 | — |
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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