GB/T33943 - 304 Stainless Steel - Grade A - Grade 4.8 - Whitened
Product Details
Product Name: Yongjing Part Flat Washer Retaining Ring Screw
Technical Standard: GB/T 33943
Product Grade: Grade A
Performance Grade: Grade 4.8
Material: 304 Stainless Steel
Surface Treatment: Whitened
Product Type: Integrated Retaining Ring Screw with Flat Washer
Product Specifications
Detailed product specifications can be provided according to customer requirements, including screw diameter, length, washer inner/outer diameter, washer thickness and other key parameters.
Product Description
Product Overview
This product is a part flat washer retaining ring screw complying with the GB/T 33943 standard, manufactured from 304 stainless steel material with a performance grade of 4.8. Its structural feature is that a standard flat washer is permanently combined with the screw head (or thread end) through riveting, welding or integral forming process. This design aims to provide a non-separable washer-screw assembly. The "whitened" surface treatment provides a clean matte appearance and basic corrosion resistance, suitable for precision part fixing occasions that require preventing washer loss, improving assembly efficiency, or achieving specific electrical grounding/shielding connections.
Core Advantages
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Integrated Assembly to Prevent Loss: The flat washer is permanently combined with the screw, completely solving the problem that small washers are easy to scatter and lose during assembly, transportation or maintenance.
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Improve Assembly Efficiency: There is no need to handle the washer separately during assembly, which simplifies the operation steps. It is especially suitable for automatic assembly lines and mass production, and can significantly improve efficiency.
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Ensure Connection Consistency: The integrated structure ensures that each installation is necessarily equipped with a washer, avoiding unstable connection performance or potential safety hazards caused by missing installation.
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Reliable Contact: The contact resistance between the integrated washer and the screw head is more stable, and it performs better in some applications that require good electrical contact (such as grounding).
Applicable Industries
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Precision Instruments and Electronic Manufacturing: Occasions with many parts, compact space and requirements for anti-loosening and anti-loss, such as circuit board installation, micro-motor fixing, and sensor housing assembly.
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Automotive Component Assembly: Automatic assembly lines that require efficient anti-loosening and noise prevention, such as automotive interior parts, wire harness fixing points, ECU control boxes, and lighting components.
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Home Appliances and Consumer Electronics: Assembly of products that use a large number of screws for fixing, such as washing machine control panels, internal air conditioning modules, and internal structures of computer cases.
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Communication and IT Equipment: Equipment that requires reliable grounding and quick maintenance, such as internal server brackets, switch modules, and optical fiber module fixing.
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Medical Devices and Equipment: Assembly that requires high cleanliness and strict part management, such as medical equipment housings, detachable panels, and internal modules of diagnostic instruments.
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Industrial Automation Equipment: Fixing of components that require frequent debugging or maintenance, such as robot joint covers, assembly line tooling plates, and internal components of control cabinets.
Warm Tips
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This product is a one-time assembly, and the washer cannot be replaced separately. If the washer is damaged, the entire screw needs to be replaced.
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The "whitened" treatment is a clean surface, and its corrosion resistance is lower than that of bright surface plating. For high-corrosion environments, it is recommended to choose other surface treatments (such as passivation).
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During installation, please ensure that the washer surface is completely attached to the workpiece surface to achieve the best pressure dispersion and anti-loosening effect.
