Standard: DIN 985 - 1987
Available sizes: M3 to M8 (6 sizes)
| Standard Body | Standard Number |
|---|---|
| GB | GB /T 6172.2 |
| NF | NF E 25-412 |
| DIN | DIN 985 |
| ISO | ISO 10511 |
| UNI | UNI 7474 |
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|
| M3 | 0.7 | 2.2 | 2.9 | 4.6 | 5.9 | / | / | 5 | 4.7 | 4 | 7.66 |
| M4 | 1 | 3.3 | 4 | 6.75 | 8.9 | / | / | 6 | 5.7 | 6 | 11.05 |
| M5 | 1.25 | 4.4 | 5.5 | 8.75 | 11.6 | 1 | / | 8 | 7.64 | 8 | 14.38 |
| M6 | 1.75 | 6.6 | 8 | 13 | 17.4 | 1.5 | 1.25 | 12 | 11.57 | 12 | 21.1 |
| M7 | 2 | 8.8 | 10.5 | 17.3 | 22.5 | 1.5 | / | 16 | 15.3 | 16 | 26.75 |
| M8 | 2.5 | 9.9 | 13 | 19.5 | 24.9 | 2 | 1.5 | 18.5 | 17.66 | 18 | 29.56 |
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.
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