Standard: EN 24035 - 1992
Available sizes: (M3.5) to M6 (8 sizes)
| Standard Body | Standard Number |
|---|---|
| EN | EN 24035 |
| GB | GB /T 6172.1 |
| IS | IS 1364(-4) |
| NF | NF E 25-405-1 |
| DIN | DIN EN ISO 4035 |
| ISO | ISO 4035 |
| UNI | UNI 5589 |
| Size | P | r | k_max | k_min | s_max | s_min | ds_max | ds_min |
|---|
| k_nominal |
|---|
| ds_nominal |
|---|
| (M3.5) | 1.5 | 15.73 | 17.77 | 5 | 10 | 10.8 | 3.8 | 16 | 14.6 | 4.7 |
| M1.6 | 0.4 | 3.82 | 4.32 | 1.2 | 2 | 2.3 | 0.8 | 4 | 3.1 | 0.95 |
| M2 | 0.5 | 5.32 | 6.01 | 1.8 | 3 | 3.45 | 1.2 | 5.5 | 4.6 | 1.55 |
| M2.5 | 0.7 | 6.78 | 7.66 | 2.2 | 4 | 4.6 | 1.6 | 7 | 5.9 | 1.95 |
| M3 | 1 | 9.78 | 11.05 | 3.2 | 6 | 6.75 | 2.3 | 10 | 8.9 | 2.9 |
| M4 | 2 | 20.67 | 23.35 | 7 | 14 | 15.1 | 5.1 | 21 | 19.6 | 6.42 |
| M5 | 2.5 | 26.16 | 29.56 | 9 | 18 | 19.5 | 6.7 | 27 | 24.9 | 8.42 |
| M6 | 2.5 | 29.16 | 32.95 | 10 | 20 | 21.6 | 7.3 | 30 | 27.7 | 9.1 |
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.