Standard: NB /T 47027 - 2012
Available sizes: M16 to M27 (4 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|
| M16 | 2.5 | 34 | 33 | 36.96 | 20.4 | 19.1 | 13.9 |
| M20 | 3 | 46 | 45 | 50.4 | 27.4 | 26.1 | 20.9 |
| M24 | 3 | 60 | 58.8 | 65.86 | 36.5 | 34.9 | 27.9 |
| M27 |
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 |
| 75 |
| 73.1 |
| 81.87 |
| 48.5 |
| 46.9 |
| 37.5 |
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