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  • VIDEO
  • Hengzemei 320pcs Copper Washers Metric Sealing Assortment Set Flat Crush Washer kit Oil Drain Plug Gasket 12 Sizes M5-M20
  • Copper Sealing Flat Washers Assortment Kit 320pcs (M5-M20)Cazemei

320pcs Copper Washers Metric Sealing Assortment Set Flat Crush Washer kit Oil Drain Plug Gasket 12 Sizes M5-M20

4.7 out of 5 stars (55)

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About this item

  • Size and Quantity: The copper seal kit includes 320 pieces in 12 sizes, including the most commonly used copper seal sizes M5 M6 M8 M10 M12 M14 M16 M20
  • High Quality Copper: the seal is made of solid copper, which is heat resistant, high pressure resistant, highly conductive, offers strong sealing, and durability, making it very suitable for oil pan plugs and hydraulic accessories
  • Widely Used: O-ring copper washers are an ideal choice for electrical connections in households, automobiles, ships, commercial equipment, generators, mechanical equipment, and more
  • Product Features: The flat washer has a smooth surface and good ductility, increasing the contact surface; when used with screws, it reduces friction between fasteners and prevents pressure transmission or distribution
  • Easy to Install and Carry: The imperial and standard copper washers are packaged in a durable transparent box, making them easy to carry, store, and access

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This item: Hengzemei 320pcs Copper Washers Metric Sealing Assortment Set Flat Crush Washer kit Oil Drain Plug Gasket 12 Sizes M5-M20
$24.59
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Product details

  • Product Dimensions ‏ : ‎ 17.53 x 9.4 x 2.29 cm; 320 g
  • Date First Available ‏ : ‎ June 24 2025
  • Manufacturer ‏ : ‎ Hengzemei
  • Place of Business ‏ : ‎ Huizhoushi,Guangdong 516083,CN
  • ASIN ‏ : ‎ B0FFBN17K2
  • Item model number ‏ : ‎ C001
  • Country of origin ‏ : ‎ China
  • 鶹 Rank: #2,842 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement)
  • Customer Reviews:
    4.7 out of 5 stars (55)

Product information

Technical Details

Manufacturer ‎Hengzemei
Place of Business ‎Huizhoushi,Guangdong 516083,CN
Part number ‎C001
Item Weight ‎320 g
Product Dimensions ‎17.53 x 9.4 x 2.29 cm; 320 g
Item model number ‎C001
Size &;17.5×9.5×2.2
Colour ‎Gold
Finish ‎Glossy
Material ‎Copper
Shape ‎Flat
Thickness ‎1.5 Millimeters
Number of Pieces ‎320
Head Style ‎Flat
Length ‎6.9 inches
Width ‎3.7 inches
Height ‎0.9 inches

Additional Information

ASIN B0FFBN17K2
Customer Reviews
4.7 out of 5 stars (55)

4.7 out of 5 stars
鶹 Rank
Date First Available June 24 2025

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Hengzemei 320pcs Copper Washers Metric Sealing Assortment Set Flat Crush Washer kit Oil Drain Plug Gasket 12 Sizes M5-M20


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Product Description

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Customer Reviews
5.0 out of 5 stars 29
4.4 out of 5 stars 30
4.9 out of 5 stars 31
4.5 out of 5 stars 44
4.7 out of 5 stars 55
Category: Metric Flat washer
Material:Copper Washers no data no data no data
Material: Aluminum Washers no data no data no data
Material: Stainless Steel Washers no data no data no data no data
Brand: Hengzemei

320pcs Copper Washer Assortment Kit 12 Sizes Flat Washers Assortment Set Sealing Washers Kit Hardware Fasteners for Industrial & DIY Use

Copper Flat Washers Assortment Set

Effects of the product

The flat copper gasket has undergone professional annealing treatment, which has the ultimate flexibility and ductility, improving the sealing performance. It can adaptively deform with bolt pressure, perfectly filling the small gap of the flange to prevent oil, gas, and liquid leakage!

Suitable for heat-critical automotive applications including engine components, fuel fittings, fuel systems, hydraulic systems, hydraulic connections, as well as specific parts like sump plugs and water fittings.

The seal is made of solid copper,very suitable for oil pan plugs and hydraulic accessories

crush washer kit

Made of high-quality copper material

Durable and resistant to high pressure, with strong sealing performance.

drain plug gasket kit

Strong corrosion resistance

Not easy to rust, moisture-proof, anti-oxidation, acid and alkali resistant. Suitable for both indoor and outdoor use.

oil plug crush washer

Good Performance

Has excellent conductivity and thermal conductivity, with a melting point of up to 1083 ℃.

copper crush washer kit

Low temperature resistance

The annealed and pickled copper gasket has excellent low-temperature resistance and is suitable for use in extremely cold regions.

automotive engine oil drain plug washers

Why do the red copper need to be "softer"?

Annealing process for excellent sealing performance

We adhere to the annealing process, only to perfectly solve your sealing needs!

Each copper washer is accurately annealed at controlled temperature to reshape the copper grain into a more ductile equiaxial structure. Copper gaskets treated by this process:

  • More than 3-fold increase in ductility
  • Excellent flexible compression resistance
  • It can perfectly fit the micro irregularity of flange joint surface

This "softer" behavior is the key to sealing performance: the ability to deflect slightly ensures that the gasket fits snugly against the contact surface, creating a reliable sealing barrier against liquid or gas leakage. This is an advantage that hard copper gaskets cannot match.

When a reliable seal is required, especially under high-temperature and high-pressure conditions, red copper washers are a more desirable choice than brass washers due to their superior plasticity.

Widely Used

copper crush washer kit

O-ring copper washers are an ideal choice for electrical connections in households, automobiles, ships, commercial equipment, generators, mechanical equipment, and more.

Easy to Install and Carry

drain plug gasket

The copper washers are packaged in a durable transparent box, with clear classification, making them easy to carry, store, and access.