Standard: GB /T 13807.2
Available sizes: (M27) to M30 (7 sizes)
| Standard Body | Standard Number |
|---|---|
| GB | GB /T 13807.2S |
| DIN | DIN 2510-3K |
| Size | P | k_max | k_min | s_max | s_min | k_nominal |
|---|---|---|---|---|---|---|
| (M27) | 4.5 | 24 | 10 | 32.5 | 28 | 42 |
| (M33) | 5.5 | 32 | 13 | 44 | 40 | 56 |
| M12 | 2 | 10 | 5 | 12 | 12 | 16 |
| M16 | 3 | 11 | 6 | 18 | 14 |
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.
| 24 |
| M20 | 3.5 | 13 | 6 | 23 | 18 | 30 |
| M24 | 4 | 22 | 9 | 27.5 | 25 | 36 |
| M30 | 5 | 27 | 11 | 37.5 | 32 | 48 |
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