Standard: UNI 5933 - 1988
Available sizes: M10 to M8 (6 sizes)
| Standard Body | Standard Number |
|---|---|
| GB | GB /T 70.3 |
| DIN | DIN EN ISO 10642 |
| ISO | ISO 10642 |
| UNI | UNI 5933 |
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M10 | 2.5 |
| 12.032 |
| 12.212 |
| 36 |
| 35.38 |
| 46 |
| 20 |
| 8.5 |
| 12 |
| 19.67 |
| 13.72 |
| M3 | 0.7 | 2.52 | 2.6 | 8 | 7.64 | 14 | 4 | 2.3 | 2.5 | 3.82 | 2.87 |
| M4 | 1 | 4.02 | 4.12 | 12 | 11.57 | 18 | 6 | 3.3 | 4 | 5.82 | 4.58 |
| M5 | 1.5 | 6.02 | 6.14 | 20 | 19.48 | 26 | 10 | 5.5 | 6 | 9.78 | 6.86 |
| M6 | 2 | 10.025 | 10.175 | 27 | 26.48 | 34 | 14 | 7 | 10 | 13.73 | 11.43 |
| M8 | 2.5 | 12.032 | 12.212 | 33 | 32.38 | 42 | 18 | 8 | 12 | 17.73 | 13.72 |
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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