Standard: JB /T 7934 - 1999
Available sizes: 20 to 40 (8 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 20 | 47 | 14 | 90 | M6 | 8 | 17 | 20 | 0.3 | 195 | 27.5 | 27 |
| 22 | 55 | 14 | 95 | M6 | 10 | 17 | 20 | 0.47 |
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.
| 185 |
| 27.5 |
| 33 |
| 25 | 60 | 14 | 105 | M6 | 12 | 17 | 20 | 0.7 | 180 | 27.5 | 40 |
| 28 | 65 | 14 | 110 | M6 | 14 | 17 | 20 | 0.92 | 180 | 27.5 | 46 |
| 30 | 75 | 35 | 125 | M8 | 12 | 20 | 24 | 1.62 | 210 | 33.5 | 72 |
| 35 | 85 | 35 | 130 | M8 | 14 | 20 | 24 | 2.27 | 200 | 33.5 | 83 |
| 38 | 95 | 35 | 130 | M8 | 16 | 20 | 24 | 3.04 | 190 | 33.5 | 93 |
| 40 | 115 | 70 | 125 | M10 | 14 | 24 | 28 | 4.9 | 195 | 39 | 131 |
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