Standard: CNS 4366 - 1987
Available sizes: M12 to M22 (4 sizes)
| Size | P | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| M12 | 2 | 27 | 0.6 | 29.56 | 26（L≤70） | 28（L＞70） | 1.6 | 1.2 | 25 | 10 |
| M16 | 2.5 | 36 | 0.8 | 39.55 | 32（L≤85） | 34（L＞85） | 2 | 1.5 | 34 |
| 14 |
| M20 | 3 | 46 | 0.8 | 50.85 | 37（L≤95） | 39（L＞95） | 2.5 | 2 | 43.5 | 17 |
| M22 | 3.5 | 50 | 0.8 | 55.37 | 40（L≤95） | 42（L＞95） | 2.5 | 2 | 47.5 | 19 |
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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