Standard: JB /T 7934 - 1999
Available sizes: 14 to 19 (6 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 14 | 25 | 0.08 | 45 | 70 | 9.1 | 32 | 30 | 95 | 80 | 20 | M20×1 |
| 15 | 25 | 0.07 | 45 | 80 | 9.1 | 32 | 32 | 95 |
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.
| 70 |
| 20 |
| M22×1 |
| 16 | 30 | 0.11 | 45 | 105 | 11 | 38 | 32 | 160 | 75 | 20 | M25×1.5 |
| 17 | 35 | 0.17 | 45 | 163 | 14.5 | 45 | 36 | 220 | 70 | 25 | M30×1.5 |
| 18 | 35 | 0.14 | 45 | 185 | 14.5 | 45 | 36 | 220 | 60 | 25 | M30×1.5 |
| 19 | 40 | 0.22 | 40 | 250 | 14.5 | 52 | 42 | 340 | 55 | 30 | M35×1.5 |
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