Standard: GB /T 5627 - 2008
Available sizes: 10 to 8 (8 sizes)
| Size | P | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|
| 10 | 17 | 18 | 26 | R 3/4 | NPT 3/4 | 60 | 32 | M30×2 | 96 |
| 12 | 22 | 21.5 | 26 | R 1 | NPT 1 | 60 | 41 | M36×2 | 98 |
| 14 | 27 | 24 |
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.
| 28.5 |
| R 1-1/4 |
| NPT 1-1/4 |
| 60 |
| 46 |
| M42×2 |
| 102.5 |
| 16 | 30 | 24 | 28.5 | R 1-1/4 | NPT 1-1/4 | 60 | 46 | M45×2 | 102.5 |
| 4 | 3.5 | 8.5 | 12.5 | R 1/8 | NPT 1/8 | 30 | 12 | M10×1 | 48.5 |
| 5 | 6 | 12.5 | 18 | R 1/4 | NPT 1/4 | 60 | 17 | M14×1.5 | 85 |
| 6 | 10 | 13 | 19 | R 3/8 | NPT 3/8 | 60 | 22 | M18×1.5 | 87 |
| 8 | 14 | 17 | 20 | R 1/2 | NPT 1/2 | 60 | 27 | M24×1.5 | 89 |
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