Standard: JASO F 116 - 2005
Available sizes: ST2 to ST4.0 (5 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| ST2 | T8 | 0.7 | 0.85 | 1.7 | 1.8 | 2.367 | 4.5 | 6 | 0.8 | 4.1 | 1.6 |
| ST2.5 | T15 | 1 | 1.2 | 2.3 | 2.45 | 3.327 | 6 | 8 |
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.
| 1.1 |
| 5.5 |
| 2.15 |
| ST3 | T20 | 1.2 | 1.4 | 2.9 | 3.05 | 3.911 | 8 | 11 | 1.5 | 7.4 | 2.75 |
| ST3.5 | T30 | 1.65 | 1.9 | 3.9 | 4.1 | 5.575 | 10.5 | 14 | 1.9 | 9.8 | 3.7 |
| ST4.0 | T40 | 2.35 | 2.6 | 5.2 | 5.4 | 6.705 | 14 | 18 | 2.6 | 13.2 | 5 |
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