Standard: GB /T 6171 - 2000
Available sizes: M10 to M8 (6 sizes)
| Standard Body | Standard Number |
|---|---|
| GB | GB /T 6171 |
| DIN | DIN EN ISO 8673 |
| ISO | ISO 8673 |
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M10 | 0.8 | 23.67 | 24 | 22.49 | 26.75 | 0.2 | 17.30 | 14.1 | 11.28 | 16.00 | 14.8 |
| M12 | 0.8 | 35 | 36 | 33.25 | 39.55 | 0.2 | 25.90 | 20.2 |
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.
| 16.16 |
| 24.00 |
| 21.5 |
| M16 | 0.8 | 53.8 | 55 | 51.11 | 60.79 | 0.2 | 38.90 | 29.4 | 23.52 | 36.00 | 31 |
| M20 | 1.0 | 73.1 | 75 | 69.45 | 82.6 | 0.3 | 51.80 | 36.4 | 29.12 | 48.00 | 38 |
| M24 | 1.0 | 92.8 | 95 | 88.16 | 104.86 | 0.3 | 69.10 | 49.1 | 39.28 | 64.00 | 51 |
| M8 | 0.6 | 15.73 | 16 | 14.63 | 17.77 | 0.15 | 10.80 | 8.04 | 6.43 | 10.00 | 8.4 |
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