Standard: JG /T 5057.33 - 1995
Available sizes: 12 to 24 (7 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal |
|---|---|---|---|---|---|---|
| 12 | 15.43 | 3.3 | 2.5 | 15 | 44 | 43.38 |
| 14 | 19.52 | 4.3 | 3.5 | 19 | 56 | 55.26 |
| 16 | 23.52 | 5.3 | 4.5 | 23 | 66 | 64.8 |
| 18 | 28.52 | 6.3 | 5.5 |
| 28 |
| 85 |
| 83.6 |
| 20 | 34.62 | 8.3 | 7.5 | 34 | 105 | 103.6 |
| 22 | 40.62 | 8.3 | 7.5 | 40 | 120 | 118.6 |
| 24 | 43.62 | 8.3 | 7.5 | 43 | 125 | 123.4 |
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.