Standard: JB /T 997 - 1977
Available sizes: 10 to 6 (5 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 10 | 12 | 1.5 | 7 | 23 | 19 | 20 | 19.8 | 25 | 10 | M27*1.5 | 18.72 |
| 14 | 20 | 2.5 | 9 | 32 | 28 | 30 | 29.66 | 30 | 13 | M36*2 | 27.72 |
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.
| 18 |
| 32 |
| 3 |
| 12 |
| 48 |
| 42 |
| 40 |
| 39.66 |
| 39 |
| 18 |
| M52*2 |
| 41.66 |
| 22 | 36 | 5 | 15 | 56 | 50 | 45 | 44.66 | 44 | 20 | M60*2 | 49.66 |
| 6 | 6 | 1.5 | 4 | 14 | 11 | 11 | 10.8 | 18 | 8 | M16*1.5 | 10.76 |
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