Standard: JIS B 2804
Available sizes: 20 to 32 (6 sizes)
| Size | P | k_max | k_min | s_max | s_min | ds_max | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|
| 20 | 20.7 | 1.13 | 2 | 20.2 | 1.2 | 1.9 | 1.27 | 2.1 |
| 22 | 26.1 | 1.43(1.53) | 2.8 | 25.6 | 1.5(1.6) | 2.7 | 1.57(1.67) | 2.9 |
| 25 | 29.8 | 1.43(1.53) | 2.8 | 29.3 | 1.5(1.6) |
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.
| 2.7 |
| 1.57(1.67) |
| 2.9 |
| 28 | 37.4 | 1.67 | 3.5 | 36.4 | 1.75 | 3.38 | 1.83 | 3.62 |
| 30 | 41.9 | 1.67 | 3.5 | 40.9 | 1.75 | 3.38 | 1.83 | 3.62 |
| 32 | 51.3 | 1.92 | 4 | 50.1 | 2 | 3.88 | 2.08 | 4.12 |
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