Standard: JB /T 7934 - 1999
Available sizes: 45 to 75 (8 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 45 | 80 | 1.7 | 105 | 9 | 4.15 | 64 | 72 | 41 | 170 | M8 | 174 |
| 48 | 85 | 1.7 | 95 | 9 | 4.8 | 64 | 72 | 41 |
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.
| 150 |
| M8 |
| 174 |
| 50 | 95 | 2 | 105 | 11 | 6.9 | 64 | 72 | 41 | 155 | M8 | 213 |
| 55 | 115 | 3.8 | 110 | 11 | 12.7 | 78 | 88 | 83 | 170 | M10 | 338 |
| 60 | 125 | 4.3 | 110 | 12 | 15.7 | 78 | 88 | 83 | 165 | M10 | 369 |
| 65 | 135 | 4.7 | 110 | 13 | 19 | 78 | 88 | 83 | 160 | M10 | 400 |
| 70 | 155 | 737 | 110 | 13 | 32 | 100 | 112 | 145 | 155 | M12 | 583 |
| 75 | 165 | 8.3 | 120 | 15 | 40.3 | 100 | 112 | 145 | 165 | M12 | 673 |
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