Standard: GB /T 3733
Available sizes: 10 to 8 (5 sizes)
| Size | P | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| 10 | L | 16.5 | 24 | 40 | M30*2 | M26*1.5 | 39.7 | 32 | 18 | 40.3 |
| 4 | LL | 8 | 13.5 | 21.5 | M10*1 | M8*1 | 21.2 | 12 | 3 |
| 21.8 |
| 5 | LL | 9 | 14.5 | 22.5 | M12*1 | M10*1 | 22.2 | 14 | 4.5 | 22.8 |
| 6 | L | 13.5 | 20.5 | 32.5 | M22*1.5 | M18*1.5 | 32.2 | 24 | 11 | 32.8 |
| 8 | L | 14.5 | 22 | 36 | M26*1.5 | M22*1.5 | 35.7 | 27 | 14 | 36.3 |
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.
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