Standard: KS B 1058 - 2017
Available sizes: M4 to M6 (3 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M4 | 0.8 | 0.3~1.5 | 0.8 | 4 | 3.7 | / | 9 | 4.7 | 1 | 8.64 | 5 |
| M5 | 1.25 | 0.3~1.5 | 0.8 | 6.5 | 6.14 | 1 | 12 | 7.14 |
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.
| 1 |
| 11.57 |
| 7.5 |
| M6 | 1.75 | 0.5~2 | 1 | 10 | 9.57 | 1.25 | 17 | 11.57 | 1.2 | 16.57 | 12 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.