Standard: BS 450 - 1958
Available sizes: 1/4 to 3/16 (3 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/4 | 0.3750 | 0.031 | 0.112 | 0.787 | 0.215 | 16 | 20 | 0.094 | 0.081 | 0.823 | 0.191 |
| 1/8 | 0.1875 | 0.015 | 0.061 | 0.425 | 0.118 | 24 | 32 |
| 0.060 |
| 0.050 |
| 0.448 |
| 0.103 |
| 3/16 | 0.3125 | 0.031 | 0.096 | 0.666 | 0.183 | 18 | 22 | 0.084 | 0.072 | 0.698 | 0.162 |
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.