Standard: ASME B 18.3
Available sizes: 1/4 to 8# (6 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/4 | 0.625 | 0.312 | 0.306 | 0.625 | 0.6163 | 11 | 18 | 0.867 | 0.316 | 24 | 0.875 |
| 10# | 0.5 | 0.25 | 0.244 | 0.5 | 0.4919 | 13 | 20 |
| 0.743 |
| 0.254 |
| 28 |
| 0.75 |
| 4# | 0.125 | 0.062 | 0.059 | 0.125 | 0.1202 | 40 | 44 | 0.198 | 0.065 | — | 0.205 |
| 5# | 0.164 | 0.078 | 0.079 | 0.164 | 0.1585 | 32 | 36 | 0.262 | 0.085 | — | 0.27 |
| 6# | 0.25 | 0.125 | 0.121 | 0.25 | 0.2435 | 20 | 28 | 0.365 | 0.127 | 32 | 0.375 |
| 8# | 0.375 | 0.188 | 0.182 | 0.375 | 0.3678 | 16 | 24 | 0.55 | 0.192 | 32 | 0.562 |
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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