Standard: GB /T 3764 - 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 | 24.4 | 24.3 | 19.2 | 18.8 | 16 | M30×2 | 22.29 | 22.16 | 19 | 22 |
| 4 | LL | 6.6 | 6.5 | 3.6 | 3.4 | 10 | M10×1 | 5.215 | 5.14 | 3.5 | 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.
| 5 |
| LL |
| 9.6 |
| 9.5 |
| 6.1 |
| 5.9 |
| 10 |
| M12×1 |
| 8.24 |
| 8.15 |
| 6 |
| 8 |
| 6 | L | 17.4 | 17.3 | 12.2 | 11.8 | 25 | M22×1.5 | 15.26 | 15.15 | 12 | 15 |
| 8 | L | 20.4 | 20.3 | 15.2 | 14.8 | 16 | M26×1.5 | 18.26 | 18.15 | 15 | 18 |
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