Standard: JB /T 7934 - 1999
Available sizes: 140 to 165 (3 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 140 | 263 | 15 | 100 | M12×50 | 12 | 115 | 50 | 487 | 28 | 62 | 7 |
| 155 | 300 | 22 | 240 | M16×55 | 8 | 135 | 56 | 711 |
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.
| 48 |
| 68 |
| 7 |
| 165 | 350 | 41 | 240 | M16×65 | 12 | 140 | 71 | 928 | 65 | 85 | 8 |
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