Standard: JB /T 7919.3 - 1999
Available sizes: 10 to 30 (7 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 10 | NB01 | 11 | / | 25 | 3 | NBA01 | 12 | 3 | 1 | 17 | 10.5 |
| 12 | NB03 | 11 | 4 | 32 | 4 | NBA03 | 17 | 4 | 1 | 24 | 15.5 |
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.
| 15 |
| NB05 |
| 13 |
| 4 |
| 42 |
| 5 |
| NBA05 |
| 25 |
| 5 |
| 1.25 |
| 32 |
| 23 |
| 17 | NB07 | 13 | 4 | 57 | 6 | NBA07 | 35 | 5 | 1.25 | 44 | 32.5 |
| 20 | NB09 | 13 | 5 | 69 | 6 | NBA09 | 45 | 6 | 1.25 | 56 | 42.5 |
| 25 | NB11 | 17 | 5 | 81 | 8 | NBA11 | 55 | 7 | 1.5 | 67 | 52.5 |
| 30 | NB12 | 17 | 6 | 86 | 8 | NBA12 | 60 | 7 | 1.5 | 73 | 57.5 |
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