Standard: GB /T 13829.1
Available sizes: 1.5 to 6 (7 sizes)
| Standard Body | Standard Number |
|---|---|
| GB | GB /T 13829.3 |
| DIN | DIN EN ISO 8742 |
| ISO | ISO 8742 |
| Size | P | k_max | s_max | s_min | k_nominal |
|---|---|---|---|---|---|
| 1.5 | 2 | +0.05，0 | 1.975 | 0.25 | 2.84 |
| 2 | 3 | ±0.05 | 2.975 | 0.4 | 6.4 |
| 2.5 | 5 | ±0.05 | 4.97 | 0.63 | 17.6 |
| 3 | 8 | ±0.05 | 7.964 | 1 | 45.2 |
| 4 | 12 | ±0.1 |
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.
| 11.957 |
| 1.6 |
| 101.8 |
| 5 | 20 | ±0.1 | 19.948 | 2.5 | 283 |
| 6 | 25 | ±0.1 | 24.948 | 3 | 444 |
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