Standard: UNI 5587 - 1968
Available sizes: M10 to M8 (8 sizes)
| Standard Body | Standard Number |
|---|---|
| GB | GB /T 6176 |
| DIN | DIN EN ISO 8674 |
| ISO | ISO 8674 |
| UNI | UNI 5587 |
| Size | P | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|
| M10 | 3 | 23.48 | 36 |
| 2 |
| 39.98 |
| 137 |
| 133 |
| 24 |
| 35.38 |
| M12 | 3 | 26.48 | 41 | 2 | 45.63 | 200 | 195 | 27 | 40.38 |
| M3 | 0.7 | 3.7 | 7 | / | 7.74 | 1 | / | 4 | 6.85 |
| M4 | 1 | 5.7 | 10 | / | 11.05 | 2.96 | / | 6 | 9.78 |
| M5 | 1.25 | 7.64 | 13 | 1 | 14.39 | 6.5 | 6.38 | 8 | 12.73 |
| M6 | 1.75 | 11.57 | 19 | 1.25 | 21.1 | 20.3 | 19.8 | 12 | 18.67 |
| M7 | 2 | 15.57 | 24 | 1.5 | 26.75 | 40.5 | 39.6 | 16 | 23.67 |
| M8 | 2.5 | 19.48 | 30 | 1.5 | 33.53 | 79.1 | 76.2 | 20 | 29.67 |
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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