Standard: ASME B 18.16
Available sizes: 1/4 to 7/16 (4 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/4 | 0.3125 | 0.343 | 0.375 | 0.489 | 0.577 | 18 | 24 | 0.820 | 0.790 | 0.500 | 0.557 |
| 3/8 | 0.5625 | 0.546 | 0.578 | 0.861 | 1.01 | 12 | 18 | 1.300 |
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.
| 1.260 |
| 0.875 |
| 0.982 |
| 5/16 | 0.4375 | 0.437 | 0.468 | 0.675 | 0.794 | 14 | 20 | 1.131 | 1.100 | 0.688 | 0.768 |
| 7/16 | 0.6250 | 0.600 | 0.640 | 0.922 | 1.083 | 11 | 18 | 1.360 | 1.280 | 0.938 | 1.051 |
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