Standard: GB /T 2225 - 1991
Available sizes: M12 to M24 (4 sizes)
| Size | P | e | k_max | k_min | s_max | s_min | ds_min | k_nominal |
|---|---|---|---|---|---|---|---|---|
| M12 | A | 1900 | 26.72 | 16 | 35 | 62 | 32 | 27 |
| M16 | A | 3900 | 35.66 | 24 | 50 | 90 | 45 | 36 |
| M20 | B | 9000 | 54.6 | 36 | 75 |
| 140 |
| 72 |
| 55 |
| M24 | B | 17000 | 74.6 | 48 | 95 | 185 | 96 | 75 |
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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