Standard: GB /T 3390.1 - 2013
Available sizes: 41 to 60 (5 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|
| 41 | 46 | 36 | 80 | 19.62 | 66.4 | 55 | 2143 |
| 46 | 55 | 43.2 | 95 | 23.42 | 77.6 | 57 | 2562 |
| 50 | 65 | 50.4 | 110 | 26.92 | 90.1 | 78 | 2795 |
| 55 | 75 | 60 | 120 | 30.92 | 110 | 90 | 2795 |
| 60 | 80 | 65 | 125 | 34 | 115 | 95 | 2795 |
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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