Standard: JIS B 1256
Available sizes: (Φ3.5) to Φ4 (6 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|
| (Φ3.5) | 10.5 | 1.6 | 1.8 | 10.77 | 18 | 17.57 | 1.4 |
| Φ1.6 | 2.2 | 0.3 | 0.35 | 2.34 | 4.5 | 4.2 | 0.25 |
| Φ2 | 3.2 | 0.5 | 0.55 | 3.38 | 6 | 5.7 | 0.45 |
| Φ2.5 | 4.3 | 0.5 | 0.55 | 4.48 | 8 | 7.64 | 0.45 |
| Φ3 | 6.4 | 1.6 | 1.8 | 6.62 | 11 | 10.57 | 1.4 |
| Φ4 | 13 | 2 | 2.2 | 13.27 | 20 | 19.48 | 1.8 |
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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