Standard: GB /T 101 - 1986
Available sizes: (4.5) to 4 (7 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| (4.5) | 3.5 | 4.04 | 4.76 | 19.48 | 3 | 10 | 9.64 | 2.85 | 2.5 | 20 | 5.8 |
| 1.6 | 0.9 | 0.74 | 1.06 | 3.7 | 0.6 | 2 | 1.86 |
| 0.75 |
| 0.5 |
| 4 |
| 1.2 |
| 2 | 1.2 | 1.1 | 1.5 | 5.7 | 0.9 | 3 | 2.75 | 1.05 | 0.8 | 6 | 1.7 |
| 2.5 | 1.6 | 1.46 | 1.94 | 7.64 | 1.2 | 4 | 3.7 | 1.35 | 1 | 8 | 2.2 |
| 3 | 2 | 2 | 2.6 | 9.64 | 1.5 | 5 | 4.7 | 1.55 | 1.2 | 10 | 3 |
| 3.5 | 2.5 | 2.3 | 2.9 | 11.57 | 1.8 | 6 | 5.7 | 1.95 | 1.6 | 12 | 3.5 |
| 4 | 3 | 3.1 | 3.7 | 15.57 | 2.4 | 8 | 7.64 | 2.35 | 2 | 16 | 4.5 |
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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