Standard: ISO 8673 - 1988
Available sizes: (M14) to M8 (6 sizes)
| Standard Body | Standard Number |
|---|---|
| GB | GB /T 6171 |
| DIN | DIN EN ISO 8673 |
| ISO | ISO 8673 |
| Size | P | e | r | k_max | k_min | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| (M14) | 1.5 | 14.48 | 18.1 | 23.7 | 22 |
| 0.8 |
| 37.29 |
| 19.4 |
| 0.2 |
| 31.35 |
| (M18) | 2 | 19.44 | 24.3 | 32.4 | 30 | 0.8 | 50.85 | 25.6 | 0.2 | 42.75 |
| M10 | 1.5 | 9.68 | 12.1 | 15.1 | 14 | 0.6 | 23.36 | 12.8 | 0.15 | 19.64 |
| M12 | 1.5 | 12.08 | 15.1 | 19.5 | 18 | 0.8 | 29.56 | 15.8 | 0.2 | 24.85 |
| M16 | 2 | 18 | 22.5 | 29.1 | 27 | 0.8 | 45.2 | 23.8 | 0.2 | 38 |
| M8 | 1 | 6.43 | 8.04 | 10.8 | 10 | 0.6 | 17.77 | 8.4 | 0.15 | 14.63 |
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.