Standard: GB /T 3733.1 - 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 | 25 | 19.4 | 39.3 | 15 | 39 | 17 | M27×2 | 34 | 39.3 | 16 | 34 |
| 12 | 25 | 32.1 | 47.3 | 20.5 | 46 | 22 | M33×2 | 41 |
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.
| 47.3 |
| 18 |
| 41 |
| 14 | 25 | 52.7 | 57.7 | 22.5 | 50 | 27 | M42×2 | 50 | 57.7 | 20 | 50 |
| 4 | 25 | 2.27 | 17.3 | 8 | 23 | 3.5 | M10×1 | 15 | 17.3 | 8 | 15 |
| 5 | 25 | 4.53 | 20.8 | 13 | 30 | 6 | M12×1.5 | 18 | 18.5 | 12 | 16 |
| 6 | 25 | 7.7 | 27.7 | 14 | 34 | 10 | M16×1.5 | 24 | 24.2 | 12 | 21 |
| 8 | 25 | 12.2 | 31.2 | 15 | 36 | 14 | M22×1.5 | 27 | 31.2 | 14 | 27 |
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