Standard: JIS B 1122
Available sizes: 2 to 3.5 (4 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 5 | 1.34 | 1.72 | 0.2 | 0.55 | 4.6 | 1.45 | 1 | 2.9 | 1.25 | 0.6 |
| 2.5 | 7 | 1.60 | 2.13 | 0.25 | 0.8 | 6.5 | 2 |
| 2 |
| 4.3 |
| 1.7 |
| 0.8 |
| 3 | 9 | 2.38 | 2.93 | 0.3 | 1 | 8.4 | 2.55 | 2 | 5.1 | 2.25 | 1 |
| 3.5 | 12 | 2.90 | 3.46 | 0.4 | 1.4 | 11.3 | 3.4 | 3 | 6.9 | 3.0 | 1.4 |
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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