Standard: ASTM F 436
Available sizes: M12 to M22 (5 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|
| M12 | 16.4 | 4.6 | 3.1 | 16.0 | 30.0 | 28.7 | 12.2 |
| M14 | 22.5 | 4.6 | 3.1 | 22.0 | 42.0 | 40.4 | 17.5 |
| M16 | 26.5 | 4.6 | 3.4 | 26.0 | 50.0 | 48.4 | 21.0 |
| M20 | 33.6 | 4.6 | 3.4 |
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.
| 33.0 |
| 60.0 |
| 58.1 |
| 26.2 |
| M22 | 39.6 | 4.6 | 3.4 | 39.0 | 72.0 | 70.1 | 31.5 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.