Standard: GB 846 - 1976
Available sizes: 2.5 to 4 (3 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 | k_nominal |
|---|---|---|---|---|---|---|
| 2.5 | 6 | 1.8 | 2.4 | 5.7 | 0.2 | 1.7 |
| 3 |
| 9 |
| 3 |
| 4 |
| 8.64 |
| 0.4 |
| 2.5 |
| 4 | 11 | 3.6 | 4.8 | 10.57 | 0.4 | 3 |
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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