Standard: UNI 10227 - 1993
Available sizes: (2.2) to 4 (6 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| (2.2) | 2 | 1.4 | 3 | 2.2 | 1.95 | 3.5 | 5.6 | 4.4 | 1 | 5.3 | 0.1 |
| 2 | 1.23 | 0.86 | 2.6 | 1.6 | 1.4 | 2.8 | 4 |
| 3.4 |
| 1 |
| 3.7 |
| 0.1 |
| 2.5 | 2.7 | 1.63 | 4.4 | 2.8 | 2.55 | 4.4 | 7.5 | 5.8 | 2 | 7.14 | 0.2 |
| 3 | 3.3 | 2.26 | 5 | 3.55 | 3.25 | 5.6 | 9.5 | 7.2 | 2 | 9.14 | 0.2 |
| 3.5 | 3.9 | 2.49 | 6.5 | 3.95 | 3.65 | 7.3 | 10.8 | 10 | 3 | 10.4 | 0.25 |
| 4 | 4.8 | 3 | 7.1 | 4.55 | 4.25 | 8.5 | 12.5 | 9.5 | 3 | 12.07 | 0.4 |
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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