Standard: GB /T 32076.7 - 2015
Available sizes: (M39) to M48 (4 sizes)
| Size | P | k_max | k_min | s_max | s_min | ds_max | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|
| (M39) | 4.5 | 32.4 | 25.9 | 64.7 | 76.95 | 68.1 | 34 | 70 |
| (M45) | 5.5 | 43.4 | 34.7 | 83.4 | 99.2 | 87.8 | 45 | 90 |
| M42 | 5 | 36.4 | 29.1 | 74.2 |
| 88.25 |
| 78.1 |
| 38 |
| 80 |
| M48 | 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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