Standard: GB 2159 - 1991
Available sizes: M10 to M8 (4 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|
| M10 | Tr16×4 左 | 31.2 | 26 | M24×2 | 27 | 26.72 | 19 |
| M12 | Tr24×5 左 | 47.3 | 39 | M36×2 | 41 | 40.66 | 26 |
| M16 | Tr36×6 左 | 63.5 | 53 | M48×3 | 55 | 54.6 | 33 |
| M8 | / | 19.85 | 18 | M18×1.5 | 18 | 17.72 | 15 |
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.