Standard: GB /T 32076.7 - 2015
Available sizes: (M39) to M48 (4 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| (M39) | 4.5 | 26 | 76.95 | 48.0 | 42 | 74 | 0.5 | 43 | 64.70 | 1 | 41 |
| (M45) | 5.5 | 35 | 99.2 | 64.2 | 56 | 90 | 0.5 |
| 57.2 |
| 83.40 |
| 1 |
| 54.8 |
| M42 | 5 | 30 | 88.25 | 55.0 | 48 | 82 | 0.5 | 49 | 74.20 | 1 | 47 |
| M48 | 6 | 40 | 110.5 | 73.2 | 64 | 100 | 0.5 | 65.2 | 92.90 | 1 | 62.8 |
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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