Standard: HG /T 21573.2
Available sizes: M48 to M56 (3 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_min | k_nominal |
|---|---|---|---|---|---|---|---|---|---|
| M48 | 4 | 12 | 85 | 36 | 42 | BT-III | 52 | 110 | 44 |
| M52 | 4 | 12 | 105 | 42 | 52 | BT-III | 64 | 125 | 56 |
| M56 | 4 | 14 | 125 | 50 | 68 | BT-I |
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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| 295 |
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