Standard: JIS B 2808 - 1978
Available sizes: 1 to 2.5 (7 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|
| 1 | 1.4 | 1.1 | 1.2 | 1.3 | 0.25 | 0.12 | 1.28 |
| 1.2 | 1.7 | 1.4 | 1.5 | 1.6 | 0.3 | 0.15 | 1.58 |
| 1.4 | 2.25 | 1.9 | 2 | 2.15 | 0.4 | 0.2 | 2.09 |
| 1.5 | 3.25 | 2.9 | 3 |
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.
| 3.15 |
| 0.6 |
| 0.3 |
| 3.09 |
| 1.6 | 5.4 | 4.8 | 5 | 5.2 | 1 | 0.5 | 5.12 |
| 2 | 8.6 | 7.8 | 8 | 8.3 | 1.6 | — | 8.15 |
| 2.5 | 13.7 | 12.7 | 13 | 13.4 | 2.5 | — | 13.2 |
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