Standard: JIS B 2809
Available sizes: FR10 to FR8 (7 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| FR10 | 1.75 | 14 | 15 | 9 | 10 | 21 | 21.5 | 53 | 14.5 | 19.5 | 8.7 |
| FR12 | 2 | 16 | 17 | 11 | 12.5 | 25 | 25.5 | 62 | 16.5 | 22.5 | 10.7 |
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.
| FR14 |
| 2.5 |
| 22.7 |
| 24.3 |
| 13 |
| 14.5 |
| 34 |
| 34.5 |
| 86 |
| 23.5 |
| 31.5 |
| 12.7 |
| FR16 | 2.5 | 24.7 | 26.3 | 15 | 16.5 | 42 | 42.5 | 98 | 25.5 | 39.5 | 14.6 |
| FR18 | 3.5 | 33.5 | 35.5 | 19 | 21 | 53 | 54 | 136 | 34.5 | 50 | 18.5 |
| FR20-22 | 3.5 | 36.5 | 38.5 | 21 | 23 | 60 | 61 | 150 | 37.5 | 57 | 20.5 |
| FR8 | 1.5 | 11.5 | 12.5 | 7 | 8 | 15 | 15.5 | 45 | 12 | 13.5 | 6.7 |
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