Standard: YJT 4025
Available sizes: 20 to 40 (6 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 20 | 0.85 | 1.1 | 0.85 | 0.6 | 0.35 | 2.2 | 5.0 | 1.75 | 0.65 | 1.6 | 6 IP |
| 22 | 1.12 | 1.5 | 1.30 | 0.8 | 0.5 | 3.0 | 6.5 |
| 2.80 |
| 1.00 |
| 2.3 |
| 10 IP |
| 25 | 1.46 | 2.0 | 1.80 | 1.0 | 0.6 | 4.0 | 9.0 | 3.95 | 1.40 | 3.1 | 20 IP |
| 30 | 1.80 | 2.5 | 1.90 | 1.2 | 0.7 | 5.0 | 11.0 | 4.50 | 1.50 | 3.5 | 25 IP |
| 35 | 2.48 | 3.5 | 2.90 | 1.6 | 0.9 | 7.0 | 15.5 | 5.60 | 2.30 | 4.9 | 30 IP |
| 40 | 2.82 | 4.0 | 3.20 | 1.8 | 1.0 | 8.00 | 18.0 | 6.75 | 2.60 | 5.6 | 40 IP |
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.