Standard: BS 3410
Available sizes: 1/4 to 7/16 (4 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal |
|---|---|---|---|---|---|---|
| 1/4 | 0.333 | 0.04 | 0.072 | 0.328 | 0.625 | 0.62 |
| 3/8 | 0.593 | 0.056 | 0.104 | 0.588 | 1.125 | 1.115 |
| 5/16 | 0.458 | 0.048 | 0.092 | 0.453 | 0.875 | 0.87 |
| 7/16 | 0.781 | 0.072 | 0.128 |
| 0.776 |
| 1.5 |
| 1.49 |
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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