Standard: JB /T 7934 - 1999
Available sizes: 25 to 55 (8 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 25 | 55 | 17 | 101 | M6 | 6 | 32 | 40 | 0.94 | 265 | 46 | 67 |
| 28 | 60 | 17 | 87 | M6 | 7 | 44 | 54 | 1.3 |
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.
| 165 |
| 60 |
| 74 |
| 30 | 75 | 41 | 116 | M8 | 7 | 44 | 54 | 3.26 | 251 | 62 | 145 |
| 35 | 85 | 41 | 104 | M8 | 9 | 56 | 64 | 5.15 | 205 | 72 | 186 |
| 40 | 95 | 41 | 100 | M8 | 10 | 56 | 64 | 6.75 | 187 | 72 | 207 |
| 45 | 120 | 83 | 115 | M10 | 11 | 70 | 78 | 14.5 | 215 | 88 | 362 |
| 50 | 145 | 145 | 107 | M12 | 14 | 90 | 100 | 26.3 | 200 | 112 | 527 |
| 55 | 155 | 145 | 110 | M12 | 17 | 90 | 100 | 31.8 | 198 | 112 | 575 |
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