Standard: GOST 21249
Available sizes: 10 to 8 (5 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 10 | 23 | 4 | 14 | 11 | 10.57 | 22.48 | 22 | 12.57 | 5 | 21.48 | 13 |
| 12 | 35 | 5 | 19 | 15 | 14.57 | 34.38 | 28 |
| 18.48 |
| 10 |
| 27.48 |
| 19 |
| 16 | 44 | 5 | 22 | 19 | 18.48 | 43.38 | 35 | 24.48 | 13 | 34.38 | 25 |
| 20 | 56 | 6 | 30 | 27 | 26.48 | 55.26 | 55 | 35.38 | 18 | 54.26 | 36 |
| 8 | 14 | 2 | 10 | 7 | 6.64 | 13.57 | 16 | 7.64 | 3 | 15.57 | 8 |
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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