Standard: GB /T 1231
Available sizes: (M22) to 螺栓连接副 (5 sizes)
| Size | P | s_max | s_min | k_nominal |
|---|---|---|---|---|
| (M22) | M36 | 36 | 36 | M36 |
| M12 | M20 | 20 | 20 | M20 |
| M16 | M24 | 24 | 24 | M24 |
| M20 | M30 | 30 | 30 | M30 |
| 螺栓连接副 | M12 | 12 | 12 | M12 |
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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