Standard: SAE J 493 - 1961
Available sizes: 1/4 to 7/16 (5 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/4 | 0.373 | 0.938 | 1.062 | 0.031 | 0.119 | 0.368 | 0.5 | 0.327 | 0.321 | 0.125 | 0.104 |
| 3/16 | 0.248 | 0.672 | 0.766 | 0.031 | 0.088 | 0.243 | 0.375 | 0.214 | 0.209 | 0.094 | 0.073 |
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.
| 3/8 | 0.746 | 1.719 | 1.906 | 0.078 | 0.182 | 0.741 | 0.938 | 0.678 | 0.668 | 0.25 | 0.167 |
| 5/16 | 0.496 | 1.203 | 1.359 | 0.047 | 0.151 | 0.491 | 0.625 | 0.439 | 0.431 | 0.156 | 0.136 |
| 7/16 | 0.996 | 2.219 | 2.406 | 0.109 | 0.182 | 0.991 | 1.188 | 0.928 | 0.918 | 0.344 | 0.167 |
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