Standard: GB 559
Available sizes: 1 to 6 (6 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | O4 | 0.037 | 10 | 1 | 1 | 4.90(0.50) | 11 | 14 | 14.7 | 1.5 | 3×20 |
| 2 | O4 | 0.082 | 13 | 1 | 1 | 7.84(0.80) | 14 | 18 |
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.
| 18.9 |
| 1.5 |
| 3×25 |
| 3 | O4 | 0.166 | 16 | 1 | 1 | 12.25(1.25) | 18 | 22 | 23.1 | 1.5 | 4×25 |
| 4 | O4 | 0.326 | 20 | 1.5 | 1.5 | 19.60(2.00) | 22 | 28 | 29.4 | 2 | 5×35 |
| 5 | O4 | 0.621 | 25 | 1.5 | 1.5 | 31.36(3.20) | 28 | 35 | 36.8 | 2 | 6×35 |
| 6 | O4 | 1.26 | 32 | 2 | 2 | 49.00(5.00) | 35 | 44 | 46.2 | 2.5 | 6×45 |
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