Standard: GB 6181 - 1986
Available sizes: (M14) to M8 (6 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| (M14) | 4 | 332.9 | 23.18 | 8.5 | 7 | 60.79 | 34.7 | 53.8 | 23.7 | 33.1 | 55 |
| M10 | 2.5 | 52.74 | 13.87 | 5.7 | 4.5 | 32.95 | 20.3 |
| 29.16 |
| 14.3 |
| 19 |
| 30 |
| M12 | 3.5 | 186.1 | 19.08 | 8.5 | 7 | 50.85 | 28.6 | 45 | 19.6 | 27.3 | 46 |
| M5 | 1 | 1.71 | 3.2 | 2.6 | 2 | 11.05 | 5.7 | 9.78 | 3.5 | 5.4 | 10 |
| M6 | 1.5 | 7.35 | 5 | 3.4 | 2.8 | 17.77 | 9.3 | 15.73 | 5.3 | 8.94 | 16 |
| M8 | 2 | 18.38 | 8.74 | 4.25 | 3.5 | 23.35 | 14.1 | 20.67 | 9.1 | 13.4 | 21 |
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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