Standard: HG /T 20631
Available sizes: 15 to 40 (5 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 15 | 3/4 | 66.5 | 39.6 | 25.4 | 39.6 | 4.5 | 3 | 20.7 | 25.4 | 20.7 | 56 |
| 20 | 1-1/4 | 82.5 | 60.5 | 47.8 | 60.5 | 4.5 | 3 |
| 38.1 |
| 47.8 |
| 38.1 |
| 75 |
| 25 | 2 | 111 | 85.9 | 69.9 | 85.9 | 4.5 | 3 | 55.6 | 69.9 | 55.6 | 104.5 |
| 32 | 3 | 148.5 | 120.7 | 101.6 | 120.7 | 4.5 | 3 | 81 | 101.6 | 81 | 136.5 |
| 40 | 5 | 215 | 177.8 | 155.7 | 177.8 | 4.5 | 3 | 131.8 | 155.7 | 131.8 | 196 |
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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