Standard: JB /T 3411.112 - 1999
Available sizes: 16 to 40 (5 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 16 | 22.24 | 24.1 | 24.2 | 34 | 33.84 | 22.11 | 33 | 6.145 | 6.07 | 32.84 | 6 |
| 22 | 32.28 | 34.8 | 35 | 47 | 46.84 | 32.12 | 46 | 8.17 | 8.08 | 45.84 | 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.
| 27 | 50.29 | 53.5 | 53.7 | 69 | 68.81 | 50.13 | 68 | 12.205 | 12.095 | 67.81 | 12 |
| 32 | 80.34 | 85.5 | 85.7 | 109 | 108.78 | 80.15 | — | 18.205 | 18.095 | — | 18 |
| 40 | 100.39 | 107 | 107.2 | 134 | 133.75 | 100.17 | — | 25.24 | 25.11 | — | 25 |
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