Standard: YJT 4021
Available sizes: M1 to M1.7 (5 sizes)
| Size | P | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|
| M1 | 0.25 | 0.6 | 1.65 | 1.9 | 2.5 | 0.5 | 1 | 0.45 | 3 |
| M1.2 | 0.35 | 0.8 | — | 2.5 | 4 | 1.2 | 1.5 | 0.5 | 4.48 |
| M1.4 | 0.4 | 1 | 4.5 | 3.5 | 4.5 | 1.5 |
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.
| 1.8 |
| 0.6 |
| 4.5 |
| M1.6 | 0.45 | 1.5 | 4 | 4.5 | 5.5 | 1.6 | 1.8 | 0.8 | 5 |
| M1.7 | 0.7 | 2.6 | 5.5 | 7 | 8 | 1 | 2 | 2.3 | 6.5 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.