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Pan head with washer self tapping screw-DIN968
- Product description：Round head cross self tapping screw with gasket-din968
Round head cross self tapping screw with gasket-din968
Material: stainless steel 304316, grade 8.8 high strength and grade 12.9 high strength
Product standard:DIN968
It can also support non-standard customization.
Interpretation of DIN968 Standard
DIN968 is a specification within the German Industrial Standards (DIN) system specifically for round-head cross recessed self-tapping screws with washers. This standard defines strictly and in meticulous detail aspects such as the screw's dimensional specifications, thread accuracy, mechanical properties, and surface treatment. From the nominal diameter of the screw—covering common sizes ranging from the smaller M2.5 to the larger M6—to the thread pitch, thread angle, and even the precise dimensions and depth of the cross recess, every parameter is assigned clear and accurate numerical requirements. This ensures that products manufactured by different producers in accordance with DIN968 maintain a high level of consistency and interchangeability in terms of quality and performance, meeting the diverse usage needs of various industries worldwide.
Highlights of Product Design
Round-Head Design
The round-head shape not only gives the screw an aesthetically pleasing appearance but also serves practical functional purposes. In application scenarios where surface flatness and aesthetics are important—such as electronic product casings and furniture surfaces—the round-head design prevents sharp edges from scratching surrounding objects, while also leaving the installed surface smoother and neater.
Cross Recess Structure
Compared to traditional slotted (flat) heads, the cross recess enables more effective torque transmission when using a cross screwdriver. During the screw-tightening process, the cross recess fits more closely with the screwdriver bit, significantly reducing the risk of slipping. This not only improves installation efficiency and reduces operation time and labor costs but also ensures the screw is tightened securely, enhancing the reliability and stability of the connection.
Integrated Washer
The unique disc-shaped washer design beneath the round-head cross recessed self-tapping screw is one of its notable advantages. During installation, the washer increases the contact area with the surface of the connected component, allowing the pressure from the tightened screw to be distributed evenly. This feature effectively prevents issues such as indentations or deformation on the surface of the connected component caused by excessive local pressure. Additionally, the washer enhances connection stability, acting as an extra anti-loosening safeguard to reduce the likelihood of the screw coming loose in vibrating environments. It also simplifies the installation process to a certain extent, eliminating the need for a separate washer.
Self-Tapping Feature
The threads of this type of screw are specially designed to have self-tapping capabilities. The shape and sharpness of the threads allow the screw to cut a matching thread directly into the connected component—typically made of softer materials such as thin metal sheets, plastic, or wood—without the need for pre-drilling. This further improves installation efficiency, making it particularly suitable for on-site construction or scenarios where high installation convenience is required.
Wide-Ranging Application Fields
3C Electronics Industry
In the manufacturing of 3C products (computers, communications devices, and consumer electronics) such as computers, mobile phones, and tablets, DIN968 round-head cross recessed self-tapping screws with washers are widely used to secure internal components like circuit boards, heat sinks, and casings. Electronic products have compact internal spaces and impose extremely high requirements on the dimensional accuracy and connection stability of components. With its precise dimensions, reliable self-tapping performance, and effective anti-loosening effect, this screw ensures that various parts of electronic products do not loosen due to factors such as vibration or temperature changes during long-term use, thereby guaranteeing the normal operation and stability of the products.
Furniture Manufacturing Industry
Round-head cross recessed self-tapping screws with washers are extensively used in both wooden furniture and metal-frame furniture. For wooden furniture, their self-tapping function allows easy insertion into wood, while the round head and smooth washer design not only ensure a secure connection but also avoid damaging the aesthetic appearance of the wood surface. For metal-frame furniture, they effectively connect different metal components, and their rust-proof treated material can adapt to various usage environments, extending the service life of the furniture.
Automotive and Machinery Manufacturing
In automotive manufacturing, these screws play a role in installing interior parts and securing certain small components. In the machinery manufacturing industry, for small mechanical structures that require frequent disassembly and installation, the self-tapping and anti-loosening characteristics of this screw make it an ideal choice, facilitating equipment maintenance and upkeep.
Construction and Decoration Industry
In construction and decoration works—such as the installation of lightweight partition walls, the fixing of suspended ceilings, and the connection of small metal components—round-head cross recessed self-tapping screws with washers are favored by construction workers for their convenient installation method and reliable connection performance. They can self-tap threads into materials like thin metal sheets or gypsum boards, eliminating the need for pre-drilling and improving construction efficiency.
Material and Surface Treatment
Material Selection
Common materials for DIN968 round-head cross recessed self-tapping screws with washers include carbon steel and stainless steel. Carbon steel has a relatively low cost and a certain level of strength, making it suitable for general indoor environments and connection scenarios where high strength is not a special requirement. Stainless steel, on the other hand, exhibits excellent corrosion resistance and can maintain stable performance in harsh environments such as damp, acidic, or alkaline conditions. It is often used in outdoor facilities, buildings in coastal areas, and industrial equipment that demands high corrosion resistance.
Surface Treatment
To further enhance the screw's performance and service life, surface treatment is usually applied. Galvanization is a common method: a zinc protective film is formed on the screw surface, strengthening its rust resistance in general environments. Black oxide coating creates a dense oxide film on the screw surface, which not only provides a certain degree of rust protection but also improves the product's aesthetic texture. For application scenarios requiring high surface hardness and gloss, nickel plating can increase the surface hardness of the screw while giving it a bright luster, and further enhance its corrosion resistance.
With its strictly followed standard specifications, ingenious product design, wide application fields, and diverse material and surface treatment options, the DIN968 round-head cross recessed self-tapping screw with washer has become an indispensable and important component in the field of industrial fastening, continuously providing solid support for the stable development of various industries.
