Products Description
Hex Head Screw with Built-in Washer are fasteners with a built-in washer on the head. Compared to the traditional "screw + washer" combination, they integrate anti-loosening, stress distribution, and scratch prevention functions, reducing the number of parts, improving assembly efficiency, and effectively reducing costs and assembly errors.
This structure combines high torque capacity, uniform stress distribution, and excellent sealing performance, and is widely used in automotive manufacturing, construction machinery, energy equipment, rail transportation, electronics and electrical engineering, wind power assembly, and structural components for new energy storage systems.
Product Nature and Features
| Integrated Flange Design |
Integrated Washer: A larger diameter circular flange is integrated below the screw head, functioning as a gasket but integral with the Hexagon - Headed Bolt Featuring a Flange and inseparable. Optimized Load-Bearing Surface: The flange face provides a much larger support area than standard hexagonal head screws, effectively distributing pressure on the surfaces of the connected parts during tightening and preventing material damage or deformation. |
| Diverse Flange Face Forms |
Flat Face Flange: Provides a standard support surface suitable for most common connection scenarios. Zergled Flange: The flange bottom face has annular or radial serrations that "engage" with the surfaces of the connected parts during tightening, producing a strong anti-loosening effect, especially suitable for vibration environments. Concave Flange: The flange face is slightly concave in the center, perfectly fitting protrusions or specific curved surfaces on stamped parts, achieving a self-centering function. |
| Wide Range of Materials and Strength Grades |
Materials: Covers carbon steel, alloy steel, stainless steel (304/316), brass, etc., to meet different strength, corrosion resistance, and conductivity requirements. Strength ratings: From common grades 4.8, 8.8, 10.9 to 12.9, a full range of strength options is available to meet various application needs from light to heavy loads. |
Manufacturing Advantages
Precision Cold Heading Integrated Forming Technology
Our core competitiveness lies in our multi-station cold heading process. By designing highly complex progressive dies, we can head wire rods into a complete blank with a flange, hexagonal head, and threaded shank in a single stroke. This process is non-cutting, resulting in high material utilization, complete metal flow lines, and superior mechanical properties.
Automated and Large-Scale Production Capabilities
We possess multiple automated production lines, from raw material processing, cold heading, thread rolling, heat treatment, to surface treatment. Robotic arms and conveyor systems work in tandem, enabling large-scale, high-precision, and low-cost production.
Stringent End-to-End Quality Control
From spectral analysis of raw materials to dimensional and crack detection of cold-headed parts, to hardness and metallographic structure testing after heat treatment, and to finished product torque coefficient and salt spray testing, we have established a quality traceability system covering the entire lifecycle, ensuring that every Screw with Hexagon Head and Integral Flange is reliable.
Application Advantages: Cross-Industry Superior Performance
Automotive Manufacturing
Hexagon Head Screw with Washer Fitted. Provides reliable vibration-resistant connections in critical components such as engines and chassis.
01
Heavy Equipment
Withstands heavy loads and intense vibrations in construction machinery and agricultural equipment.
02
Electronics and Communications
Hex Head Screw with Washer Combined provides stable and reliable connection solutions in cabinets and equipment racks.
03
New Energy Sector
Metal Fastener Meets harsh environmental challenges in wind power and photovoltaic equipment.
04
Aerospace
Hexagon - Shaped Head Bolt with Flange Provides lightweight, highly reliable connections in non-critical structural components.
05
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