Standard: JG /T 5057.29 - 1995
Available sizes: M12 to M24 (7 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|
| M12 | 2 | 20.67 | 14 | 2.1 | 23.35 | 21 | 13.3 |
| M14 | 2.5 | 26.16 | 18 | 2.7 | 29.56 | 27 | 17.1 |
| M16 | 2.5 | 33 | 22 | 3.3 | 37.29 | 34 | 20.7 |
| M18 | 3 | 40 | 26.7 | 3.9 | 45.2 | 41 | 25.4 |
| M20 | 3.5 | 49 | 32.5 | 4.6 | 55.37 | 50 | 30.9 |
| M22 | 4 | 58.8 | 37.5 | 5.4 | 60.44 | 60 | 35.9 |
| M24 | 4.5 | 63.8 | 40.3 | 5.8 | 72.02 | 65 | 38.7 |
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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