Standard: ASME B 18.2
Available sizes: 1/2 to 7/16 (7 sizes)
| Size | P | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 1.1250 | 1.030 | 1.631 | 1.688 | 7 | 12 | 2.386 | 0.970 | 8 | 2.209 |
| 1/4 | 0.3125 | 0.283 | 0.547 | 0.562 | 18 | 24 | 0.795 | 0.249 | — |
| 0.721 |
| 3/4 | 1.5000 | 1.348 | 2.175 | 2.250 | 6 | 12 | 3.182 | 1.276 | 8 | 2.956 |
| 3/8 | 0.6250 | 0.569 | 0.969 | 1.000 | 11 | 18 | 1.414 | 0.525 | — | 1.300 |
| 5/16 | 0.4375 | 0.394 | 0.728 | 0.750 | 14 | 20 | 1.061 | 0.356 | — | 0.970 |
| 5/8 | 1.3750 | 1.237 | 1.994 | 2.062 | 6 | 12 | 2.917 | 1.169 | 8 | 2.708 |
| 7/16 | 0.8750 | 0.792 | 1.269 | 1.312 | 9 | 14 | 1.856 | 0.740 | — | 1.712 |
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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