Standard: QC /T 858 - 2011
Available sizes: M16 to M20 (3 sizes)
| Size | P | k_max | k_min | s_max | s_min | ds_max | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|
| M16 | 1.5 | 27 | 26.16 | 2 | 28 | 21.73 | 27.16 | 29.56 |
| M18 | 1.5 | 34 | 33 | 2 | 35 | 26.72 | 33.4 | 37.29 |
| M20 | 2 | 36 | 35 | — | 38 | 29.12 | 36.4 | 39.55 |
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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