Standard: GB /T 158 - 1996
Available sizes: 10 to 8 (7 sizes)
| Size | P | s_max | s_min | k_nominal |
|---|---|---|---|---|
| 10 | 47 | 50 | 52 | 1.5 |
| 12 | 73 | 76 | 78 | 2 |
| 14 | 97 | 108 | 110 | 2 |
| 18 | 108 | 122 | 124 | 2 |
| 5 | 15 | 16 | 17 | 0.5 |
| 6 |
| 23 |
| 22 |
| 23.5 |
| 1 |
| 8 | 30 | 32 | 33.5 | 1 |
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.