Fastening Screw With Flange And Hex Head
Products Description
Fastening Screw with Flange and Hex Heads are structural fasteners, characterized by:
External hexagonal head design: facilitating quick tightening using wrenches or automated tools.
Integrated flange structure: creating a bearing surface beneath the bolt head.
Threaded shank and head integrally formed: avoiding the loss of traditional washers or assembly errors.
Compared to ordinary hex bolts, this structure can directly replace the "bolt + flat washer" combination during tightening, reducing the number of parts and improving assembly efficiency and reliability.
Integrated Molding Technology: The Core Support for Structural Strength and Stability
Cold Forging Integrated Molding
A multi-station cold forging machine achieves integrated molding of the bolt shank, flange, and head, avoiding the strength shortcomings of welded or assembled structures. The connection strength between the flange and the shank is equivalent to the Flanged Hexagon Head Bolt Screw strength, increasing tensile strength by more than 40% compared to welded structures, eliminating the risk of breakage.
Material Fiber Continuity
The cold forging process maintains the integrity and continuity of the material fibers (distributed along the bolt's stress direction), improving the Flanged Hex Head Bolt's fatigue resistance and load-bearing capacity. Under long-term dynamic loads (such as in mechanical transmission systems), the service life is extended by 2-3 times compared to machined bolts.
Dimensional Consistency Control
Through precision molds and automated production equipment, the flange size, thread accuracy, and head size error of bolts in the same batch are ensured to be ≤±0.03mm, adapting to the batch production needs of automated assembly lines and reducing assembly rework rates.
Application Advantages and Industry Empowerment
Automotive Industry
Widely used in key components such as engines, transmissions, chassis suspensions, and vehicle frames. Hexagon Head Flange Bolt Screws have high vibration resistance and assembly efficiency perfectly meet the demands of large-scale, high-reliability automotive production.
Construction Machinery and Agricultural Machinery
In harsh environments subjected to continuous high-intensity impacts and vibrations, the anti-loosening capability of flange bolts and their protective function for structural components ensure the safe operation of equipment.
Steel Structure Buildings and Bridges
Used to connect steel beams and gusset plates, its large load-bearing surface effectively transfers loads, while the anti-loosening design ensures the long-term safety of the structure under wind and live loads.
Electronics and Furniture
When fixing equipment casings and connecting furniture panels, Bolt with Flange and Hexagon Head ensures tightness without leaving unsightly indentations on plastic or wood surfaces, balancing functionality and aesthetics.
Gradient Performance Design of Materials
| Synergy of Core Strength and Surface Hardness | We use high-quality medium-carbon alloy steel or boron steel, and through overall quenching and tempering, we obtain a high-strength, high-toughness core structure to ensure the tensile and shear resistance of the threads and shanks. Simultaneously, the bearing surface of the Hexagon Flange Head Machine Screws can be locally strengthened to achieve higher surface hardness, wear resistance, and deformation resistance, and maintain a flat, compressed state over the long term. |
| Overall Solution for Stainless Steel Materials | For A2-70/A4-80 grade stainless steel bolts, we have overcome the challenge of controlling the material hardening characteristics in the integrated molding process, ensuring that the Hexagon Head Screw with Washer possesses excellent corrosion resistance while fully meeting and maintaining stable mechanical properties, avoiding the risk of brittleness due to work hardening. |
| Functional Surface Coating System | Zinc plating, Dacromet coating, zinc-nickel alloy coatings, etc., are applied to the integrated components. Their significance lies in: 1) providing comprehensive electrochemical protection for the entire connection system; 2) the precisely controlled coating thickness and coefficient of friction are incorporated into the clamping force calculation model to ensure consistent preload. |
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