Standard: DIN 7344 - 1969
Available sizes: Φ1.5 to Φ3 (4 sizes)
| Standard Body | Standard Number |
|---|---|
| EN | EN 28748 |
| GB | GB /T 879.3 |
| DIN | DIN EN ISO 8748 |
| ISO | ISO 8748 |
| ANSI | ANSI/ASME B 18.8.3M(H) |
| Size | P | k_max | k_min | s_max | s_min | ds_max | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|
| Φ1.5 | 0.7 | 1.9 | 1.75 | 0.22 | 2.1 | 3.0772 | 2.2 | 1.5386 |
| Φ2 | 1 | 2.85 | 2.7 | 0.33 | 3.12 | 6.7228 | 3.25 | 3.3614 |
| Φ2.5 | 1.7 | 4.8 | 4.5 | 0.56 | 5.15 |
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.
| 18.5416 |
| 5.3 |
| 9.2708 |
| Φ3 | 2 | 5.8 | 5.4 | 0.67 | 6.25 | 26.46 | 6.4 | 13.23 |
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