Standard: IFI 115 - 2002
Available sizes: 1/2 to 9/16 (7 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 8 | 0.6 | 2.500 | 1.003 | 0.991 | 0.9886 | 1.500 | 1.000 | 0.268 | 1.479 | 1.130 |
| 1/4 | 18 | 0.18 | 1.125 | 0.315 | 0.306 | 0.3053 | 0.469 | 0.312 | 0.074 | 0.457 | 0.348 |
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 | 12 | 0.33 | 1.625 | 0.564 | 0.555 | 0.5538 | 0.844 | 0.563 | 0.145 | 0.828 | 0.633 |
| 5/16 | 14 | 0.26 | 1.375 | 0.438 | 0.429 | 0.4294 | 0.656 | 0.438 | 0.109 | 0.642 | 0.489 |
| 5/8 | 6 | 0.87 | 3.500 | 1.503 | 1.489 | 1.4818 | 2.250 | 1.500 | 0.433 | 2.224 | 1.697 |
| 7/16 | 10 | 0.44 | 2.000 | 0.752 | 0.743 | 0.7406 | 1.125 | 0.750 | 0.200 | 1.107 | 0.847 |
| 9/16 | 7 | 0.73 | 3.000 | 1.253 | 1.24 | 1.2336 | 1.875 | 1.250 | 0.350 | 1.852 | 1.414 |
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