Standard: GB 3473 - 1983
Available sizes: 10 to 8 (7 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 10 | 16 | 10 | 18 | 24 | 6 | 15.73 | 6 | 5 | 28 | 16 | 6 |
| 12 | 20 | 12 | 22 | 30 | 7 | 19.67 | 8 | 6 | 34 |
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.
| 20 |
| 8 |
| 14 | 25 | 14 | 26 | 38 | 8 | 24.67 | 10 | 8 | 40 | 25 | 10 |
| 16 | 30 | 17 | 32 | 44 | 8 | 29.67 | 12 | 9 | 48 | 30 | 12 |
| 18 | 40 | 22 | 42 | 60 | 9 | 39.61 | 16 | 12 | 65 | 40 | 16 |
| 6 | 8 | 6 | 9 | 12 | — | 7.78 | 4 | 3 | 14 | 8 | 4 |
| 8 | 12 | 8 | 14 | 18 | 5 | 11.73 | 5 | 4 | 21 | 12 | 5 |
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