Standard: HG /T 20634 - 1997
Available sizes: M14 to M24 (4 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal |
|---|---|---|---|---|---|---|
| M14 | 2 | 24 | 23.67 | 26.75 | 14.8 | 14.1 |
| M16 | 3 | 36 | 35 | 39.55 | 21.5 | 20.2 |
| M20 | 3.5 | 46 | 45 | 50.85 | 25.6 | 24.3 |
| M24 | 3.5 | 50 | 49 |
| 55.37 |
| 28.7 |
| 27.4 |
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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