Standard: GB /T 4329 - 2001
Available sizes: 2×40 to 5×105 (4 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|
| 2×40 | 3 | 67 | 70 | 13 | 12 | 18 | 40 |
| 3×70 | 5 | 105 | 108 | 26 | 18 | 24 | 65 |
| 4×75 | 7 | 150 | 153 | 36 | 34 | 58 | 108 |
| 5×105 |
| 8 |
| 150 |
| 153 |
| 35 |
| 40 |
| 55 |
| 88 |
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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