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Copper Washers

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Copper washers

Copper Washers

Copper washers are circular flat discs made from copper or copper alloy materials. They are commonly used as fasteners, spacers, and sealing elements in a variety of applications.

Standard Size Inside Diameter (ID) Outside Diameter (OD) Thickness
BS 4320 Copper washers M3 3.2 mm 7 mm 0.5 mm
  M4 4.3 mm 9 mm 0.8 mm
  M5 5.3 mm 10 mm 1.0 mm
  M6 6.4 mm 12 mm 1.2 mm
  M8 8.4 mm 16 mm 1.6 mm
  M10 10.5 mm 20 mm 2.0 mm
  M12 12.5 mm 24 mm 2.5 mm
  M16 16.5 mm 30 mm 3.0 mm
  M20 20.5 mm 37 mm 3.0 mm
DIN 125 Copper washers M3 3.2 mm 7 mm 0.5 mm
  M4 4.3 mm 9 mm 0.8 mm
  M5 5.3 mm 10 mm 1.0 mm
  M6 6.4 mm 12 mm 1.6 mm
  M8 8.4 mm 16 mm 2.0 mm
  M10 10.5 mm 20 mm 2.5 mm
  M12 12.5 mm 24 mm 3.0 mm
  M16 16.5 mm 30 mm 3.0 mm
  M20 20.5 mm 37 mm 4.0 mm
ASTM F844 Copper washers #6 3.2 mm 12.7 mm 1.6 mm
  #8 4.3 mm 15.9 mm 2.0 mm
  #10 5.5 mm 19.1 mm 2.5 mm
  1/4" 6.4 mm 22.2 mm 3.2 mm
  5/16" 8.0 mm 25.4 mm 3.2 mm
  3/8" 9.5 mm 28.6 mm 3.2 mm
  1/2" 12.7 mm 37.3 mm 4.8 mm
5/8" 15.9 mm 44.5 mm 4.8 mm
  3/4" 19.1 mm 50.8 mm 4.8 mm

Manufacturing Methods: Copper washers are typically produced through stamping/punching or machining processes. Stamping involves cutting discs from copper sheets or coils, while machining involves cutting washers from solid copper bars or rods.

Standards and Specifications: Copper washers are manufactured to conform to several international standards, including:

  • DIN 125 (Germany): Washers for Bolts and Screws
  • ASTM F844 (USA): Washers, Steel, Plain (Flat), Unhardened for General Use
  • BS 4320 (UK): Metal Washers for General Engineering Purposes

Dimensional Ranges:

  • Inside Diameter (ID): 3mm to 100mm
  • Outside Diameter (OD): 6mm to 115mm
  • Thickness: 0.5mm to 6.0mm

Typical Usage: Copper washers find application in various industries and equipment, including:

  • Electrical and electronics: Providing grounding, insulation, and vibration resistance in electrical enclosures, junction boxes, and circuit boards.
  • Plumbing and HVAC: Sealing fittings, valves, and pipe connections in water, gas, and refrigerant systems.
  • Automotive: Used as gaskets, insulators, and vibration damping components in engines, transmissions, and chassis.
  • Construction: Facilitating weatherproofing and corrosion resistance in roofing, siding, and exterior fastening applications.
  • General engineering: Distributing load, preventing loosening, and compensating for uneven surfaces in machinery, equipment, and structures.

The excellent electrical and thermal conductivity, corrosion resistance, and ease of fabrication make copper washers a versatile choice for a wide range of industrial, commercial, and consumer applications.



 
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