Standard: JB /T 7934 - 1999
Available sizes: 14 to 24 (7 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 14 | 55 | 25 | 3 | 62 | 38 | 17 | 30 | 142 | M8 | 22 | 18 |
| 16 | 55 | 25 | 3 | 62 | 38 | 17 | 30 | 165 | M8 |
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.
| 22 |
| 18 |
| 18 | 55 | 35 | 3 | 62 | 38 | 17 | 30 | 285 | M8 | 22 | 25.5 |
| 19 | 55 | 35 | 3 | 62 | 38 | 17 | 30 | 315 | M8 | 22 | 25.5 |
| 20 | 55 | 41 | 3 | 62 | 38 | 17 | 30 | 472 | M8 | 22 | 31.5 |
| 22 | 65 | 30 | 5 | 72 | 38 | 17 | 30 | 460 | M8 | 22 | 37.4 |
| 24 | 65 | 35 | 5 | 72 | 38 | 17 | 30 | 640 | M8 | 22 | 43.6 |
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