Standard: JIS B 1301
Available sizes: (7) to 8 (8 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal |
|---|---|---|---|---|---|---|
| (7) | 16 | 16 | 0.40~0.60 | 15.957 | 10 | 9.91 |
| 10 | 24 | 24 | 0.60~0.80 | 23.948 | 16.2 | 16.13 |
| 2 | 3 | / | 0.16~0.25 | 2.975 | 3 | 2.975 |
| 3 | 5 | 8 | 0.25~0.40 |
| 4.97 |
| 5 |
| 4.97 |
| 4 | 7 | 10 | 0.25~0.40 | 6.964 | 7.2 | 7.164 |
| 5 | 10 | 12 | 0.40~0.60 | 9.964 | 8 | 7.91 |
| 6 | 14 | 14 | 0.40~0.60 | 13.957 | 9 | 8.91 |
| 8 | 20 | 20 | 0.60~0.80 | 19.948 | 12 | 11.89 |
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.
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.