Standard: ASME B 18.6
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 | 0.5625 | 0.253 | 0.234 | 0.249 | 4 | 12 | 1.077 | 0.418 | 0.256 | 1.000 | 0.418 |
| 10# | 0.4375 | 0.194 | 0.176 | 0.193 | 4 | 14 | 0.837 |
| 0.360 |
| 0.198 |
| 0.774 |
| 0.360 |
| 4# | 0.1380 | 0.071 | 0.052 | 0.060 | 2 | 32 | 0.262 | 0.148 | 0.075 | 0.235 | 0.148 |
| 5/16 | 0.6250 | 0.228 | 0.222 | 0.276 | 5 | 11 | 1.197 | 0.488 | 0.248 | 1.112 | 0.504 |
| 6# | 0.1900 | 0.101 | 0.082 | 0.083 | 2 | 24 | 0.362 | 0.178 | 0.105 | 0.329 | 0.178 |
| 8# | 0.3125 | 0.145 | 0.126 | 0.138 | 4 | 18 | 0.597 | 0.310 | 0.148 | 0.550 | 0.310 |
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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