Standard: ASME B 18.2
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 | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 1.0000 | 0.956 | 63/64 | 1-5/8 | 1.575 | 8 | 12 | 1.796 | 1.876 | 1.625 |
| 1/4 | 0.3125 | 0.280 | 19/64 | 9/16 | 0.546 | 18 | 24 | 0.622 | 0.650 |
| 0.562 |
| 3/8 | 0.5625 | 0.526 | 35/64 | 15/16 | 0.909 | 12 | 18 | 1.037 | 1.083 | 0.938 |
| 5/16 | 0.4375 | 0.403 | 27/64 | 3/4 | 0.728 | 14 | 20 | 0.830 | 0.866 | 0.750 |
| 5/8 | 1.3750 | 1.310 | 1-11/32 | 2-3/16 | 2.119 | 6 | 12 | 2.416 | 2.526 | 2.188 |
| 7/16 | 0.7500 | 0.710 | 47/64 | 1-1/4 | 1.212 | 10 | 16 | 1.382 | 1.443 | 1.250 |
| 9/16 | 1.2500 | 1.187 | 1-7/32 | 2 | 1.938 | 7 | 12 | 2.209 | 2.309 | 2.000 |
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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