Standard: UNI 8841
Available sizes: 2 to 5 (7 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal |
|---|---|---|---|---|---|---|
| 2 | 2.54 | 0.2 | 6 | 2.4 | 5 | 4.7 |
| 2.2 | 3.38 | 0.2 | 6 | 3.2 | 6 | 5.7 |
| 2.5 | 4.48 | 0.25 | 8 | 4.3 | 8 | 7.64 |
| 3 | 6.62 | 0.4 | 10 |
| 6.4 |
| 11 |
| 10.57 |
| 3.5 | 10.77 | 0.5 | 10 | 10.5 | 18 | 17.57 |
| 4 | 15.27 | 0.6 | 12 | 15 | 24 | 23.48 |
| 5 | 17.27 | 0.6 | 12 | 17 | 26 | 25.48 |
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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