Standard: IFI 156
Available sizes: 1/4 to 5/16 (4 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/4 | 0.3750 | 0.47 | 0.60 | 0.80 | 0.73 | 18 | 1.72 | 0.17 | 0.63 | 1.66 | 0.20 |
| 10# | 0.2500 | 0.34 | 0.44 | 0.56 | 0.50 | 20 | 1.16 | 0.14 | 0.47 | 1.09 | 0.17 |
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.
| 3/8 | 0.6250 | 0.75 | 0.92 | 1.31 | 1.19 | 11 | 2.84 | 0.23 | 0.96 | 2.72 | 0.27 |
| 5/16 | 0.5000 | 0.62 | 0.76 | 1.06 | 0.94 | 13 | 2.31 | 0.20 | 0.79 | 2.22 | 0.23 |
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