Standard: ANSI B 18.6
Available sizes: 1/2 to 9/16 (7 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 | 1.661 | 0.087 | 0.188 | 0.166 | 1.875 | 1.711 | 0.162 | 0.127 | 0.494 | 0.240 |
| 1/4 | 0.3125 | 0.538 | 0.035 | 0.084 | 0.072 | 0.625 | 0.567 |
| 0.057 |
| 0.053 |
| 0.177 |
| 0.086 |
| 3/8 | 0.5625 | 0.869 | 0.054 | 0.118 | 0.102 | 1.000 | 0.906 | 0.080 | 0.078 | 0.244 | 0.120 |
| 5/16 | 0.4375 | 0.703 | 0.044 | 0.094 | 0.081 | 0.812 | 0.736 | 0.068 | 0.065 | 0.210 | 0.103 |
| 5/8 | 1.5000 | 2.505 | 0.124 | 0.258 | 0.240 | 2.812 | 2.570 | 0.244 | 0.183 | 0.742 | 0.360 |
| 7/16 | 0.7500 | 1.208 | 0.068 | 0.149 | 0.131 | 1.375 | 1.251 | 0.115 | 0.099 | 0.352 | 0.171 |
| 9/16 | 1.2500 | 2.052 | 0.105 | 0.211 | 0.193 | 2.312 | 2.110 | 0.197 | 0.155 | 0.600 | 0.291 |
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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