Standard: GB /T 13807.2
Available sizes: (M27) to M30 (7 sizes)
| Standard Body | Standard Number |
|---|---|
| GB | GB 13807.2AD |
| DIN | DIN 2510-3ZU |
| Size | P | e | k_max | k_min | s_max | s_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|
| (M27) | 4.5 | 32 | 24 | 10 | 32.5 | 28 | 64 | 15 |
| (M33) | 5.5 | 45 | 32 | 13 | 44 | 40 | 79 | 19 |
| M12 | 2 | 12 | 10 | 5 | 12 | 12 |
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.
| 31 |
| 8 |
| M16 | 3 | 16 | 11 | 6 | 18 | 14 | 42 | 8 |
| M20 | 3.5 | 21 | 13 | 6 | 23 | 18 | 50 | 12 |
| M24 | 4 | 26 | 22 | 9 | 27.5 | 25 | 57 | 14 |
| M30 | 5 | 37 | 27 | 11 | 37.5 | 32 | 70 | 19 |
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