Non-standard screws are screws that do not conform to international or industry standards for size, shape, thread type, or other characteristics. These screws differ from standard screws in that they do not follow standards set by organizations such as ISO (International Organization for Standardization), ANSI (American National Standards Institute), DIN (German Institute for Standardization), etc.
Characteristics of non-standard screws
Size and shape: Non-standard screws can have irregular sizes or shapes, which may give them advantages in specific applications. For example, the special requirements of some equipment may require a specific length, diameter, or head shape to ensure the best fit and performance.
Thread type: Standard screws usually follow a specified thread standard, such as metric thread or American thread. Non-standard screws may use a custom thread design, which may be designed to accommodate specific process requirements or to improve performance in specific materials.
Materials and treatments: Non-standard screws may vary in material and surface treatment. They may use a variety of special alloys, plastics, or specially treated materials to meet the corrosion resistance, strength, or wear resistance requirements in specific environments.
Application of non-standard screws
Customized requirements: In some special industrial applications, the design of equipment and components may require screws that are different from standard screws. For example, in the fields of aerospace, military and high-precision mechanical equipment, non-standard screws are often used to meet strict performance and reliability requirements.
Special environments: Standard screws may not provide sufficient durability or adaptability in extreme environments. Therefore, designers may choose non-standard screws to ensure that they can work properly under high temperature, low temperature, strong corrosion or high pressure conditions.
Protection and safety: Some non-standard screws are designed to prevent illegal disassembly or destruction, such as anti-theft screws, which have very special head designs and can only be operated with specific tools.
Selection and manufacturing
When manufacturing non-standard screws, designers usually need to customize their size, thread, material and treatment according to specific application requirements. Although non-standard screws may require more time and cost in the design and production process, they can provide higher adaptability and performance to meet specific engineering needs.
