Standard: JIS B 1554
Available sizes: 44 to 72 (8 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal |
|---|---|---|---|---|---|---|
| 44 | 240 | 20 | 10 | 270 | 300 | 34 |
| 48 | 280 | 24 | 12 | 320 | 350 | 38 |
| 52 | 320 | 24 | 12 | 360 | 400 | 42 |
| 56 | 360 | 28 | 15 | 420 | 460 | 58 |
| 60 |
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.
| 380 |
| 32 |
| 18 |
| 440 |
| 490 |
| 60 |
| 64 | 400 | 32 | 18 | 460 | 520 | 62 |
| 68 | 440 | 36 | 20 | 510 | 560 | 70 |
| 72 | 460 | 36 | 20 | 540 | 580 | 75 |
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