Standard: GOST 11738 - 1984
Available sizes: 3 to 8 (5 sizes)
| Size | P | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| 3 | 4 | 20 | 3.08 | 3.02 | 7 | 4 | 2 | 0.2 | 3 | 3.44 |
| 4 | 6 | 24 | 5.105 | 5.03 | 10 | 6 | 3 | 0.25 | 5 | 5.73 |
| 5 | 10 | 32 | 8.13 | 8.04 | 16 | 10 | 5 | 0.4 | 8 | 9.17 |
| 6 | 14 | 40 | 12.16 | 12.05 | 21 | 14 | 7 | 0.6 | 12 | 13.74 |
| 8 | 16 | 44 | 14.16 | 14.05 | 24 | 16 | 8 | 0.6 | 14 | 16.02 |
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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