Standard: GB 3745.1 - 1983
Available sizes: 10 to 8 (7 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|
| 10 | G 25 | 34 | 39.3 | 17 | 49 | 24 | 44.7 |
| 12 | G 25 | 41 | 47.3 | 22 | 56 | 30 | 70.7 |
| 14 | G 25 | 50 | 57.7 | 27 | 63 | 41 | 121 |
| 4 | G 25 | 15 | 17.3 |
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.
| 3.5 |
| 27 |
| 8 |
| 4.13 |
| 5 | G 25 | 18 | 20.8 | 6 | 35 | 11 | 10.2 |
| 6 | G 25 | 24 | 27.7 | 10 | 40 | 15 | 18.2 |
| 8 | G 25 | 27 | 31.2 | 14 | 44 | 21 | 26.1 |
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