Standard: EN 28734 - 1992
Available sizes: 1 to 5 (7 sizes)
| Standard Body | Standard Number |
|---|---|
| EN | EN 28734 |
| GB | GB /T 119.2 |
| DIN | DIN EN ISO 8734 |
| ISO | ISO 8734 |
| Size | P | k_max | k_min | s_max | s_min | k_nominal |
|---|---|---|---|---|---|---|
| 1 | 1.508 | 0.6 | 0.2 | 1.502 | 0.2 | 0.6 |
| 1.5 | 2.508 | 0.7 | 0.3 | 2.502 | 0.3 | 1 |
| 2 | 4.012 | 0.9 | 0.4 | 4.004 | 0.5 | 1.4 |
| 2.5 | 6.012 | 1.1 | 0.4 | 6.004 |
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.
| 0.8 |
| 2.1 |
| 3 | 10.015 | 1.4 | 0.6 | 10.006 | 1.2 | 3 |
| 4 | 16.018 | 1.8 | 0.8 | 16.007 | 2 | 4.6 |
| 5 | 20.021 | 2 | 0.8 | 20.008 | 2.5 | 6 |
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