Standard: ASME B 18.5
Available sizes: 1/2 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 1.0000 | 0.062 | 0.847 | 2.000 | 1.950 | 8 | 1.022 | 0.990 | 0.903 | 0.976 | 1.063 |
| 1/4 | 0.3125 | 0.031 | 0.233 | 0.625 | 0.609 | 18 | 0.324 |
| 0.307 |
| 0.267 |
| 0.298 |
| 0.342 |
| 3/8 | 0.6250 | 0.062 | 0.541 | 1.250 | 1.218 | 11 | 0.642 | 0.616 | 0.585 | 0.605 | 0.675 |
| 5/16 | 0.4375 | 0.031 | 0.356 | 0.875 | 0.853 | 14 | 0.452 | 0.431 | 0.394 | 0.421 | 0.468 |
| 7/16 | 0.8750 | 0.062 | 0.724 | 1.750 | 1.706 | 9 | 0.895 | 0.865 | 0.776 | 0.852 | 0.938 |
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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