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Which Scenarios Are Suitable for Different Types of Plastic Screws?

Nylon (PA) Plastic Screws

  • Internal Connections in Electronics and Electrical Equipment: Nylon offers excellent insulation, mechanical strength, and wear resistance, making it ideal for securing internal components in electronic devices—such as circuit boards, housings, and parts. For example, in computer cases, nylon screws fix motherboards and hard drive brackets, ensuring insulation safety while withstanding mild vibrations and impacts.
  • Automotive Interior Assembly: Commonly used in installing automotive interior parts, such as dashboard panels and door trim. Lightweight nylon screws reduce overall vehicle weight, and their good wear resistance and toughness adapt to slight vibrations during driving, minimizing noise.
  • Lightweight Component Connections in General Machinery: For lightweight parts in office equipment and small machinery, nylon screws provide sufficient connection strength. They avoid corrosion issues associated with metal screws, reducing maintenance costs.

Polycarbonate (PC) Plastic Screws

  • Connections for Transparent Components: PC’s exceptional transparency makes it suitable for joining parts requiring a clear appearance, such as transparent protective covers and observation windows. In instrument enclosures, PC screws secure the housing without obstructing visibility of internal components.
  • Impact-Resistant Applications: With outstanding impact resistance, PC screws are used in areas prone to external force impacts. For instance, in outdoor lighting installations, they withstand collisions and vibrations, ensuring fixture stability and safety.
  • Lightweight Connections in Moderate High-Temperature Environments (Relative to Other Plastics): PC has good heat resistance, making it suitable for environments with temperature requirements—such as connecting heat-dissipating components in electrical equipment. It maintains performance at relatively high temperatures without rapid deformation.

Polypropylene (PP) Plastic Screws

  • Food Processing Industry: PP plastic features chemical stability, water resistance, non-toxicity, and odorlessness, meeting food hygiene standards. It is widely used in internal connections for food processing equipment and packaging machinery, ensuring safety and hygiene in food production.
  • Toy Manufacturing: Lightweight, cost-effective, and flexible, PP screws are safe for children and widely used in toy assembly—such as fixing plastic toy cars and building blocks—reducing the risk of injury.
  • Marine Equipment and Humid Environments: PP’s water resistance and chemical stability make it ideal for marine equipment (e.g., non-critical internal ship connections) and humid environments like bathroom fixtures. It effectively prevents moisture-induced corrosion.

Polyoxymethylene (POM) Plastic Screws

  • Precision Instruments and Equipment: POM offers high hardness, rigidity, and dimensional stability, making it suitable for assembling precision instruments requiring accuracy—such as optical devices and electronic measuring equipment. POM screws ensure precise component alignment, maintaining instrument accuracy and performance.
  • Critical Connections in Small Machinery: For key parts in small machinery that bear loads and friction, POM screws provide reliable mechanical performance. Examples include internal connections in small power tools, where they balance strength and wear resistance to extend equipment lifespan.
  • High Wear-Resistance Requirements: With excellent wear resistance, POM screws are used in frequently moving or friction-prone components—such as sliding rails and transmission devices. They reduce wear, enhancing part reliability and stability.