Standard: SZJGJ 001
Available sizes: ST2.2 to ST4.2 (7 sizes)
| Standard Body | Standard Number |
|---|---|
| GB | GB /T 846 |
| DIN | DIN EN ISO 7050 |
| ISO | ISO 7050 |
| UNI | UNI 6955 |
| Size | P | k_max | k_min | s_max | s_min | ds_max | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|
| ST2.2 | 1.1 | 2 | 3.5 | 5.5 | 5.2 |
| 0.91 |
| 1.7 |
| 1.43 |
| ST2.9 | 1.3 | 2 | 4.2 | 6.8 | 6.5 | 1.62 | 2.35 | 2.14 |
| ST3 | 1.34 | 2 | 4.6 | 7.3 | 7 | 2.03 | 2.5 | 2.53 |
| ST3.5 | 1.6 | 2 | 5.1 | 8.8 | 8.5 | 2.59 | 2.8 | 3.1 |
| ST3.9 | 1.8 | 3 | 6.8 | 10.7 | 10.3 | 2.95 | 3.2 | 3.53 |
| ST4.0 | 1.8 | 3 | 7.1 | 12.2 | 11.8 | 3.33 | 3.65 | 3.91 |
| ST4.2 | 2.1 | 3 | 7.8 | 14.2 | 13.9 | 4.96 | 4.65 | 4.36 |
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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