Standard: ZZB 1178
Available sizes: 2 to 4 (4 sizes)
| Size | P | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 2.7 | 0.04 | 0.55 | 1.1 | 2.95 | 5.5 | 0.25 | 0.35 | 5.2 | 0.3 |
| 2.5 | 4.3 | 0.12 | 0.8 | 1.6 | 4.6 | 8 | 0.45 | 0.55 | 7.64 | 0.5 |
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.
| 3 | 6.4 | 0.22 | 1.1 | 2.2 | 6.76 | 11 | 0.45 | 0.55 | 10.57 | 0.5 |
| 4 | 10.5 | 0.97 | 2 | 4 | 10.93 | 18 | 0.7 | 0.9 | 17.57 | 0.8 |
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