Standard: GB 1339 - 1977
Available sizes: (M14) to M8 (5 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| (M14) | 1.5 | 29.72 | 30 | 20.26 | 19.74 | 23.7 | 23.6 | 12.72 | 12.28 | 20 | 12.5 |
| M10 | 1.5 | 18.72 | 19 | 13.22 | 12.78 | 15.5 | 15.4 | 8.18 | 7.82 | 13 | 8 |
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.
| M12 | 1.5 | 23.72 | 24 | 16.72 | 16.28 | 19.6 | 19.5 | 11.22 | 10.78 | 16.5 | 11 |
| M16 | 1.5 | 31.66 | 32 | 22.26 | 21.74 | 25.7 | 25.6 | 14.22 | 13.78 | 22 | 14 |
| M8 | 1.5 | 13.76 | 14 | 10.18 | 9.82 | 11 | 10.9 | 5.65 | 5.35 | 10 | 5.5 |
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