Standard: NB /T 31082 - 2016
Available sizes: M36 to M45 (4 sizes)
| Size | P | k_max | k_min | s_max | s_min | ds_max | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|
| M36 | 4 | 29.4 | 23.5 | 60 | 71.3 | 63.1 | 31 | 65 |
| M39 | 4.5 | 34.4 | 27.5 | 69.5 | 82.6 | 73.1 | 36 | 75 |
| M42 | 5 | 40.4 | 31.52 | 78.96 |
| 93.9 |
| 82.8 |
| 42 |
| 85 |
| M45 | 6 | 49.1 | 39.3 | 92.9 | 110.5 | 97.8 | 51 | 100 |
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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