Standard: ANSI B 18.6
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 | 0.291 | 0.371 | 0.612 | 0.803 | 1.312 | 1.282 | 0.188 | 0.166 | 0.656 | 0.743 |
| 1/4 | 0.3125 | 0.090 | 0.115 | 0.186 | 0.253 | 0.437 | 0.424 |
| 0.084 |
| 0.072 |
| 0.203 |
| 0.230 |
| 3/8 | 0.5625 | 0.168 | 0.213 | 0.346 | 0.467 | 0.812 | 0.792 | 0.118 | 0.102 | 0.375 | 0.427 |
| 5/16 | 0.4375 | 0.133 | 0.168 | 0.274 | 0.368 | 0.625 | 0.608 | 0.094 | 0.081 | 0.297 | 0.336 |
| 7/16 | 0.7500 | 0.223 | 0.283 | 0.466 | 0.612 | 1.000 | 0.976 | 0.149 | 0.131 | 0.500 | 0.566 |
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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