Standard: GB /T 3756 - 2008
Available sizes: (14) to 8 (8 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| (14) | L | 41 | 35 | M33*2 | 22 | 10 | 28 | 51.5 | 50.5 | M36*2 | 51 |
| (16) | S | 19 | 29.5 | M14*1.5 | 4 | 63 | 8 |
| 41 |
| 40 |
| M16*1.5 |
| 40.5 |
| 10 | L | 27 | 31.5 | Mi8*1.5 | 10 | 25 | 15 | 44.5 | 43.5 | M22*1.5 | 44 |
| 12 | L | 32 | 31.5 | M22*1.5 | 13 | 16 | 18 | 45 | 44 | M26*1.5 | 44.5 |
| 15 | L | 60 | 46.5 | M48*2 | 34 | 10 | 42 | 64.5 | 63.5 | M52*2 | 64 |
| 18 | S | 22 | 32 | M16*1.5 | 6 | 63 | 10 | 45 | 44 | M18*1.5 | 44.5 |
| 6 | L | 17 | 26.5 | M12*1.5 | 4 | 25 | 8 | 38 | 37 | M14*1.5 | 37.5 |
| 8 | L | 22 | 30.5 | M16*1.5 | 8 | 25 | 12 | 42.5 | 41.5 | M18*1.5 | 42 |
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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