Standard: BS 2470 - 1973
Available sizes: 1/4 to 7/16 (5 sizes)
| Size | P | k_max | s_max | s_min | k_nominal |
|---|---|---|---|---|---|
| 1/4 | 16 | 7/16 | 20 | 3/16 | 0.150 |
| 3/16 | 20 | 5/16 | 26 | 1/8 | 0.100 |
| 3/8 | 10 | 7/8 | 12 | 3/8 | 0.300 |
| 5/16 | 12 | 9/16 | 16 | 1/4 | 0.200 |
| 7/16 |
| 8 |
| 1-1/8 |
| 10 |
| 9/16 |
| 0.450 |
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.
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