Standard: JG /T 5057.25 - 1995
Available sizes: M12 to M24 (7 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M12 | 2 | 10.7 | 12.2 | 26.17 | 24 | 15.1 | 14 | 14.6 | 15.3 | 22 | 23.16 |
| M14 | 2.5 | 12.3 | 14 | 32.95 | 30 | 19.5 | 18 |
| 18.8 |
| 17.5 |
| 27.7 |
| 29.16 |
| M16 | 2.5 | 15.6 | 17.8 | 39.55 | 36 | 23.7 | 22 | 23.6 | 22.3 | 33.2 | 35 |
| M18 | 3 | 18.3 | 21 | 50.85 | 46 | 29.1 | 27 | 27.6 | 26.3 | 42.7 | 45 |
| M20 | 3.5 | 22.9 | 26.1 | 60.79 | 55 | 35.6 | 33 | 34.2 | 32.6 | 51.1 | 53.8 |
| M22 | 4 | 26.4 | 30.3 | 72.02 | 65 | 42.2 | 39 | 40 | 37.8 | 60.6 | 63.8 |
| M24 | 4.5 | 28.8 | 32.8 | 76.95 | 70 | 45.4 | 42 | 43 | 41 | 64.7 | 68.1 |
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.
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