Standard: JIS B 1189
Available sizes: M4 to M8 (4 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M4 | 0.8 | 3 | 5 | 8 | 7.8 | / | 5 | 12 | 9 | 4.9 | 8.87 |
| M5 | 1.25 | 4.8 | 8 | 12 | 11.75 | 1 | 8 |
| 17.5 |
| 14.5 |
| 7.85 |
| 13.25 |
| M6 | 1.75 | 7.2 | 11.5 | 17 | 16.75 | 1.25 | 12 | 25 | 22 | 11.8 | 18.90 |
| M8 | 2 | 9.6 | 15 | 22 | 21.65 | 1.5 | 16 | 33 | 30 | 15.8 | 24.49 |
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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