Standard: JB /T 7934 - 1999
Available sizes: 14 to 22 (7 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 14 | 24 | 35.5 | 179 | 36 | 42 | 32 | 29 | 40 | 285 | 16 | 45 |
| 15 | 26 | 35.5 | 200 | 41 | 47 | 34 | 34 | 42 |
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.
| 320 |
| 18 |
| 47 |
| 16 | 28 | 35.5 | 224 | 41 | 47 | 36 | 34 | 44 | 350 | 18 | 50 |
| 18 | 34 | 53.4 | 400 | 48 | 54 | 42 | 41 | 50 | 636 | 25 | 56 |
| 19 | 39 | 53.4 | 470 | 48 | 54 | 47 | 41 | 55 | 745 | 25 | 61 |
| 20 | 43 | 71.3 | 715 | 48 | 54 | 51 | 41 | 59 | 1136 | 25 | 65 |
| 22 | 50 | 71.3 | 797 | 52 | 58 | 58 | 45 | 66 | 1223 | 32 | 72 |
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