Standard: GB /T 39949.1
Available sizes: 12 to 40 (6 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 12 | 12500 | 19.165 | 18.835 | 45.195 | 4 | M14×1.5 | 45 | 9.22 | 19 | 44.805 | 9 |
| 16 | 32000 | 29.165 | 28.835 | 63.23 | 6 | M20×1.5 | 63 |
| 9.22 |
| 29 |
| 62.77 |
| 9 |
| 20 | 80000 | 46.195 | 45.805 | 95.27 | 8 | M33×2 | 95 | 13.77 | 46 | 94.73 | 13.5 |
| 25 | 200000 | 64.23 | 63.77 | 150.315 | 8 | M48×2 | 150 | 22.33 | 64 | 149.685 | 22 |
| 32 | 320000 | 86.27 | 85.73 | 180.315 | 8 | M64×3 | 180 | 26.33 | 86 | 179.685 | 26 |
| 40 | 500000 | 96.27 | 95.73 | 210.36 | 10 | M80×3 | 210 | 29.33 | 96 | 209.64 | 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.
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