Standard: ANSI B 18.6
Available sizes: 1/4 to 7/16 (4 sizes)
| Size | P | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|
| 1/4 | 0.3125 | 0.226 | 0.084 | 0.562 | 0.540 | 0.151 | 0.126 | 0.245 | 0.072 |
| 3/8 | 0.5625 | 0.378 | 0.118 | 0.937 | 0.909 | 0.252 | 0.207 | 0.409 | 0.102 |
| 5/16 |
| 0.4375 |
| 0.302 |
| 0.094 |
| 0.750 |
| 0.725 |
| 0.202 |
| 0.167 |
| 0.328 |
| 0.081 |
| 7/16 | 0.7500 | 0.507 | 0.149 | 1.250 | 1.215 | 0.338 | 0.278 | 0.546 | 0.131 |
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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