Screw plug uses 

1. Pipe and Plumbing Systems:
   • Used to close or seal openings in pipes, valves, and fittings.
   • Provide access points for maintenance, inspection, or cleaning in plumbing systems.
2. Machinery and Equipment:
   • Sealing openings on machinery and equipment to prevent the ingress of dust, dirt, or contaminants.
   • Facilitate lubrication and maintenance by providing easy access to internal components.
3. Automotive Industry:
   • Found in engines, gearboxes, and differentials to seal and protect against leaks.
   • Provide access for oil changes and inspections.
4. Hydraulic Systems:
   • Used to seal hydraulic fluid reservoirs or access points in hydraulic systems.
   • Facilitate routine maintenance and fluid checks.
5. Pressure Vessels:
   • Seal openings on pressure vessels to contain liquids or gases.
   • Allow for pressure testing and maintenance.
6. Electrical Equipment:
   • Used in electrical enclosures to seal openings and protect internal components from environmental factors.
   • Provide access for wiring and inspections.
7. Industrial Applications:
   • Found in various industrial settings for sealing or closing openings in equipment and machinery.
   • Often used in combination with other sealing methods to ensure a secure closure.
8. Water Heaters:
   • Seal openings in water heater tanks to prevent leaks and ensure proper functioning.
   • Facilitate maintenance and inspection of heating elements.
9. Air Compressors:
   • Seal openings in air compressor systems to maintain pressure and prevent air leaks.
   • Allow for maintenance and checks on compressor components.
10. Instrumentation and Gauges:
    • Used to seal openings in pressure or temperature gauges.
    • Facilitate calibration, maintenance, and replacement of gauges.