Standard: GB /T 3740 - 2008
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 | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 10 | L | / | 27 | 35 | 44 | 16 | M30×2 | 27.5 | 36 | 19 | 10 |
| 4 | LL | 11 | 9 | 15 | 21 | 10 | M10×1 | 9.5 |
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.
| 12 |
| 3.5 |
| 6 |
| 5 | LL | 12 | 12 | 17 | 23 | 10 | M12×1 | 11.5 | 14 | 6 | 7 |
| 6 | L | / | 19 | 28 | 36 | 25 | M22×1.5 | 21 | 27 | 12 | 9 |
| 8 | L | / | 24 | 31 | 40 | 16 | M26×1.5 | 23.5 | 32 | 15 | 9 |
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