Standard: JB /T 7934 - 1999
Available sizes: 14 to 18 (5 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 14 | 25 | 0.04 | 110 | 41 | 5.5 | 32 | 16.5 | 95 | 185 | 6.5 | M20×1 |
| 15 | 26 | 0.04 | 107 | 47 | 5.5 | 32 | 16.5 | 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.
| 164 |
| 6.5 |
| M20×1 |
| 16 | 30 | 0.06 | 112 | 58 | 6.6 | 38 | 16.5 | 160 | 185 | 6.5 | M25×1.5 |
| 17 | 30 | 0.06 | 111 | 66 | 6.6 | 38 | 18 | 160 | 167 | 6.5 | M25×1.5 |
| 18 | 36 | 0.06 | 124 | 120 | 8.55 | 45 | 18 | 220 | 159 | 6.5 | M32×1.5 |
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