Standard: WJ 2215 - 1994
Available sizes: (M14) to M8 (5 sizes)
| Size | P | e | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|
| (M14) | 3.5 | 50.85 | 6 | 2 | 1.5 | 0.8 | 0.2 | 10.5 | 2 |
| M10 | 2 | — | 4.5 | 1.5 | — | 0.8 | 0.2 | 6 | 1.5 |
| M12 | 3 |
| — |
| 6 |
| 2 |
| 1.5 |
| 0.8 |
| 0.2 |
| 9 |
| 2 |
| M6 | 1.25 | — | 3 | 1 | — | 0.6 | 0.15 | 3.75 | 1 |
| M8 | 1.75 | — | 4.5 | 1.5 | 1.25 | 0.6 | 0.15 | 5.25 | 1.25 |
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.