Standard: ISO 7720 - 2025
Available sizes: (M7) to M8 (5 sizes)
| Standard Body | Standard Number |
|---|---|
| GB | GB /T 6186 |
| ISO | ISO 7720 |
| Size | P | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| (M7) | 1.75 | 17.73 | 20.03 | 17.1 | 12.96 | 12 | 8.3 |
| 18 |
| 16.63 |
| 13 |
| M10 | 2.5 | 26.16 | 29.56 | 24.7 | 19.44 | 18 | 12.08 | 27 | 24.85 | 19.2 |
| M5 | 1 | 9.78 | 11.05 | 8.9 | 6.75 | 6 | 3.92 | 10 | 8.88 | 7.3 |
| M6 | 1.25 | 12.73 | 14.38 | 11.7 | 8.75 | 8 | 5.15 | 13 | 11.63 | 9.1 |
| M8 | 2 | 23.67 | 26.75 | 22.3 | 17.28 | 16 | 11.28 | 24 | 22.49 | 16.7 |
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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