Standard: JB /T 2773 - 1992
Available sizes: M14 to M30 (6 sizes)
| Size | P | k_max | s_max | s_min | k_nominal |
|---|---|---|---|---|---|
| M14 | 2 | 1.5 | 32 | 13 | 6 |
| M16 | 3 | 2 | 45 | 19.5 | 8 |
| M20 | 3.5 | 2.5 | 52 | 25 | 10 |
| M24 | 4 | 3 | 62 | 30 | 10 |
| M27 | 4.5 | 3 | 75 | 38 | 12 |
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.
| M30 |
| 5.5 |
| 4 |
| 95 |
| 48 |
| 14 |
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