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Product Overview
The Heavy Hex Structural Bolt is purpose-built for critical steel-to-steel connections in high-stress structural applications.
Key Features
Heavy hex head and controlled thread length are optimized for structural integrity.
Manufactured to meet strict engineering standards for load-bearing joints.
Sizes span metric (M12-M36) and imperial (1/2"-2-1/2") specifications.
High-strength construction resists deformation under extreme stress and dynamic loads.
| Grade | SAE Grade 5.8 / 8.8 / 10.9 / 12.9 (ISO 5.8/8.8/10.9/12.9 equivalent) |
| Size Range | M5–M36 (custom sizes available) |
| Thread Type | Metric (ISO metric thread) / UNC / UNF (customizable) |
| Standards | DIN 931 / DIN 933 / ISO 4014 / ISO 4017 / ASTM A307 (switchable per request) |
| Heat Treatment | Quenched and Tempered (Q&T) |
| Tensile Strength | ≥ 500–1200 MPa (depends on grade) |
| Yield Strength | ≥ 400–1080 MPa (depends on grade) |
| Hardness | HRC 22–39 (grade-specific) |
| Head Style | Hex Head (external hexagon) |
| Thread Class | 6g (metric) / 2A / 3A (imperial) |
| Operating Temperature | -40°C ~ 250°C |
| Material | Carbon Steel / Alloy Steel / Stainless Steel 304 / 316 |
| Surface Finish | Plain / Zinc Plated (blue/yellow/black) / Black Oxide / HDG / Dacromet |
| Matching Parts | Hex Nuts (DIN 934), Flat Washers (DIN 125), Spring Washers (DIN 127) |
Applications
High-rise building frames, wind turbine towers, stadium structures, steel bridges, and industrial structural connections.
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