Standard: JIS B 1180
Available sizes: M3 to M8 (5 sizes)
| Size | P | e | r | k_max | k_min | s_max | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| M3 | 0.7 | 1.8 | 3 | 3.5 | 5.7 | 14 | 2.8 | 2.6 | 4.7 | 7.5 |
| M4 | 1 | 2.6 | 4.24 | 5.3 | 8.7 | 18 | 4 | 3.76 | 6.8 | 10.89 |
| M5 | 1.5 | 4.3 | 6.69 | 8.9 | 14.4 | 26 | 6.4 | 6.11 | 11.2 | 17.59 |
| M6 | 2 | 6 | 9.09 | 12.5 | 19.2 | 34 | 8.8 | 8.51 | 15.7 | 22.78 |
| M8 | 2.5 | 8.5 | 12.85 | 18.2 | 27.7 | 46 | 12.5 | 12.15 | 22.4 | 32.95 |
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.
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.