Standard: GB /T 5647 - 2008
Available sizes: 10 to 8 (8 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|
| 10 | M30×2 | 20.5 | 24.5 | 22 | 22.13 | 10.5 | 36 |
| 12 | M36×2 | 22 | 26 | 27 | 27.13 | 12 | 41 |
| 14 | M42×2 | 23.5 | 28.5 | 34 | 34.16 | 13.5 | 50 |
| 16 | M45×2 | 24 | 29 |
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.
| 36 |
| 36.16 |
| 14 |
| 50 |
| 4 | M10×1 | 11.5 | 13.5 | 6.5 | 6.59 | 6.5 | 12 |
| 5 | M14×1.5 | 15.5 | 18.5 | 9.5 | 9.59 | 8.5 | 17 |
| 6 | M18×1.5 | 16.5 | 19.5 | 13.5 | 13.61 | 9.5 | 22 |
| 8 | M24×1.5 | 17 | 20 | 18 | 18.13 | 10 | 30 |
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