Standard: NZS 1421 - 1996
Available sizes: M1.6 to M6 (7 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M1.6 | 0.4 | 0.5 | 0.75 | 1.003 | 1 | 0.9 | 0.902 | 1.25 | 1 | 0.889 | 0.75 |
| M2 | 0.5 | 0.75 | 1 | 1.73 | 2 | 1.5 | 1.545 |
| 1.75 |
| 1.5 |
| 1.52 |
| 1.75 |
| M2.5 | 0.8 | 1.25 | 1.5 | 2.87 | 3.5 | 2.5 | 2.56 | 2.75 | 2.5 | 2.52 | 3.2 |
| M3 | 1.25 | 2 | 2.25 | 4.58 | 5.5 | 4 | 4.095 | 4.36 | 4 | 4.02 | 5.2 |
| M4 | 1.75 | 3 | 3.25 | 6.86 | 8.5 | 6 | 6.095 | 6.3 | 6 | 6.02 | 8.14 |
| M5 | 2.5 | 5 | 5.3 | 11.43 | 15 | 10 | 10.115 | 10.36 | 10 | 10.025 | 14.57 |
| M6 | 3 | 6 | 6.3 | 13.72 | 18 | 12 | 12.142 | 12.43 | 12 | 12.032 | 17.57 |
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.