Standard: GB 60 - 1976
Available sizes: (M14) to M8 (8 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| (M14) | 36 | 41.6 | 8.44 | 14.65 | 7 | 35.66 | 15 | 6.9 | 9 | 15.35 | 7.38 |
| (M18) | 65 | 75 | 13.3 | 22.58 | 10 | 64.6 | 23 | 9.9 |
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.
| 14 |
| 23.42 |
| 10.38 |
| M10 | 24 | 27.7 | 6.44 | 12.65 | 5 | 23.72 | 13 | 4.9 | 7 | 13.35 | 5.3 |
| M12 | 30 | 34.6 | 7.44 | 13.65 | 5 | 29.72 | 14 | 4.9 | 8 | 14.35 | 5.3 |
| M16 | 46 | 53.1 | 10.3 | 17.65 | 8 | 45.66 | 18 | 7.9 | 11 | 18.35 | 8.38 |
| M20 | 75 | 86.5 | 15.3 | 24.58 | 10 | 74.6 | 25 | 9.9 | 16 | 25.42 | 10.38 |
| M6 | 14 | 16.2 | 3.02 | 5.76 | 2.5 | 13.76 | 6 | 2.4 | 3.5 | 6.24 | 2.75 |
| M8 | 19 | 21.9 | 5.52 | 9.71 | 3.5 | 18.72 | 10 | 3.4 | 6 | 10.29 | 3.8 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.