Standard: GB /T 6563 - 1986
Available sizes: M5 to M8 (3 sizes)
| Standard Body | Standard Number |
|---|---|
| DIN | DIN 7500DE |
| UNI | UNI 8110 |
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M5 | 1 | 2.63 | 6.8 | 9.78 | 11.05 | 3 | 35 | 3.85 | 2.5 | 10 | 4.15 |
| M6 | 1.5 | 4.28 | 11.2 | 15.73 | 17.77 | 4.5 | 35 | 6.22 |
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.
| 3.8 |
| 16 |
| 6.58 |
| M8 | 1.75 | 5.05 | 13.7 | 17.73 | 20.03 | 5.25 | 35 | 7.32 | 4.4 | 18 | 7.68 |
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