Standard: GB /T 13807.3
Available sizes: (M27) to M30 (7 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|
| (M27) | 4.5 | 42 | 65 | 63.5 | 72.09 | 72.61 | 3 |
| (M33) | 5.5 | 56 | 85 | 83.5 | 94.47 | 95.07 | 4 |
| M12 | 2 | 16 | 27 | 26 | 29.56 | 30.14 | 2 |
| M16 |
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.
| 3 |
| 24 |
| 36 |
| 35 |
| 39.55 |
| 39.98 |
| 3 |
| M20 | 3.5 | 30 | 46 | 45 | 50.85 | 51.28 | 3 |
| M24 | 4 | 36 | 55 | 53.5 | 60.79 | 61.31 | 3 |
| M30 | 5 | 48 | 75 | 73.5 | 83.39 | 83.91 | 4 |
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