Standard: UNI 9327 - 1988
Available sizes: M1.6 to M6 (7 sizes)
| Standard Body | Standard Number |
|---|---|
| DIN | DIN 7984 |
| UNI | UNI 9327 |
| Size | P | e | r | k_max | k_min | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| M1.6 | 0.4 | 1.56 | 1.5 | 3.96 | 3.62 | 16 | 1.5 | 1.4 |
| 3.8 |
| 2.6 |
| M2 | 0.5 | 2.56 | 2.5 | 5.68 | 5.32 | 18 | 2.25 | 2.15 | 5.5 | 3.6 |
| M2.5 | 0.8 | 4.095 | 4 | 8.72 | 8.28 | 22 | 3.75 | 3.57 | 8.5 | 5.7 |
| M3 | 1.25 | 6.14 | 6 | 13.27 | 12.73 | 28 | 6 | 5.82 | 13 | 9.2 |
| M4 | 1.75 | 10.175 | 10 | 18.27 | 17.73 | 36 | 9 | 8.78 | 18 | 13.7 |
| M5 | 2 | 14.212 | 14 | 24.33 | 23.67 | 44 | 12 | 11.73 | 24 | 17.7 |
| M6 | 2.5 | 14.212 | 14 | 27.33 | 26.67 | 48 | 13.5 | 13.23 | 27 | 20.2 |
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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