Standard: ISO 7412 - 1984
Available sizes: (M22) to M20 (4 sizes)
| Standard Body | Standard Number |
|---|---|
| GB | GB /T 18230.2 |
| ISO | ISO 7412 |
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| (M22) | 4 | 22.5 | 66.44 | 0.4 | 41 | 56 |
| 63 |
| 35.00 |
| 55.9 |
| 0.8 |
| 37.00 |
| M12 | 2.0 | 10 | 29.56 | 0.4 | 18.7 | 31 | 38 | 15.30 | 24.9 | 0.8 | 16.70 |
| M16 | 2.5 | 14 | 39.55 | 0.4 | 25.24 | 38 | 45 | 21.16 | 33.3 | 0.8 | 22.84 |
| M20 | 3 | 17 | 50.85 | 0.4 | 31.24 | 44 | 51 | 26.16 | 42.8 | 0.8 | 27.84 |
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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