Standard: BS 1768 - 1963
Available sizes: 1/4 to 7/16 (4 sizes)
| Size | P | k_max | s_max | s_min | k_nominal |
|---|---|---|---|---|---|
| 1/4 | 0.5 | 0.577 | 0.493 | 0.192 | 0.182 |
| 3/8 | 0.875 | 1.010 | 0.867 | 0.349 | 0.339 |
| 5/16 | 0.6875 | 0.794 | 0.6795 | 0.255 | 0.245 |
| 7/16 | 1.125 | 1.300 | 1.115 | 0.432 | 0.412 |
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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