Standard: JB /T 7934 - 1999
Available sizes: 30 to 65 (8 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 30 | 60 | 135 | 17 | 52 | M6 | 40 | 17 | 1.25 | 71 | 46 | 7 |
| 35 | 75 | 136 | 41 | 64 | M8 | 48 | 20 | 2.5 |
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.
| 112 |
| 56 |
| 6 |
| 40 | 85 | 138 | 41 | 64 | M8 | 48 | 20 | 3.8 | 138 | 56 | 8 |
| 45 | 95 | 132 | 41 | 64 | M8 | 48 | 20 | 5.3 | 162 | 56 | 9 |
| 50 | 115 | 134 | 83 | 78 | M10 | 58 | 24 | 8.2 | 219 | 68 | 8 |
| 55 | 125 | 133 | 83 | 78 | M10 | 58 | 24 | 10.4 | 240 | 68 | 9 |
| 60 | 135 | 132 | 83 | 78 | M10 | 58 | 24 | 13 | 274 | 68 | 10 |
| 65 | 145 | 121 | 145 | 88 | M12 | 66 | 28 | 15 | 301 | 76 | 8 |
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