Standard: GB 559
Available sizes: 1 to 5 (5 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 4.90(0.50) | M12 | 13 | 58.8 | 17 | 20 | 21 | 12 | 12.5 | 56 | 17.9 |
| 2 | 7.84(0.80) | M14 | 16 | 73.5 | 21.5 | 25 | 26.2 | 15 | 15.5 | 70 | 22.6 |
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 |
| 12.25(1.25) |
| M18 |
| 20 |
| 92.9 |
| 27 |
| 32 |
| 33.6 |
| 19 |
| 19.5 |
| 88.5 |
| 28.4 |
| 4 | 19.60(2.00) | M24 | 26.5 | 118.1 | 34 | 40 | 42 | 25 | 25.5 | 112.5 | 35.7 |
| 5 | 31.36(3.20) | M30 | 32.5 | 148.6 | 43 | 51 | 53.6 | 31 | 31.5 | 141.5 | 45.2 |
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