Standard: GB /T 6173 - 1986
Available sizes: M10 to M8 (6 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M10 | 1.5 | 23.67 | 24 | 22.5 | 26.75 | / | 17.30 | 7.42 | 5.9 | 16.00 | 8 |
| M12 | 2 | 35 | 36 | 33.2 | 39.55 | / | 25.90 |
| 10.9 |
| 8.7 |
| 24.00 |
| 12 |
| M16 | 3 | 53.8 | 55 | 51.1 | 60.79 | / | 38.90 | 16.9 | 13.5 | 36.00 | 18 |
| M20 | 3 | 73.1 | 75 | 69.4 | 82.6 | / | 51.8 | 22.7 | 18.2 | 48 | 24 |
| M24 | 4 | 82.8 | 85 | 78.7 | 93.56 | / | 60.5 | 26.7 | 21.4 | 56 | 28 |
| M8 | 1 | 15.73 | 16 | 14.6 | 17.77 | （1.25） | 10.80 | 4.7 | 3.8 | 10.00 | 5 |
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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