Standard: YJT 8002
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 | 1/4-20 UNC | 15 | 1.3 | 12.7 | 13 | 8.9 | 8.97 | 1.5 | 1.7 | 8.7 | 12.4 |
| M5 | 3/8-16 BSW | 20 | 1.5 | 17 | 17.3 | 12.9 | 12.97 |
| 1.7 |
| 1.9 |
| 12.7 |
| 16.7 |
| M6 | 3/8-16 BSW | 20 | 1.5 | 14.5 | 14.8 | 11.9 | 11.97 | 1.7 | 1.9 | 11.7 | 14.2 |
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.