325 PCS Crush Copper Washers Assortment Kit; 10 Size Flat Sealing Copper Washers (M5-M14) for Electronic, Automotive, Motorcycles, Marine and Mechanical Use

Copper Crush Washer Assortment with 325 Metric Seals in 10 Sizes and Transparent Storage Case

Stainless Steel - 108Pcs
$30.99
$30.99
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325 PCS Crush Copper Washers Assortment Kit; 10 Size Flat Sealing Copper Washers (M5-M14) for Electronic, Automotive, Motorcycles, Marine and Mechanical Use
  • 325 PCS Crush Copper Washers Assortment Kit; 10 Size Flat Sealing Copper Washers (M5-M14) for Electronic, Automotive, Motorcycles, Marine and Mechanical Use
  • 325 PCS Crush Copper Washers Assortment Kit; 10 Size Flat Sealing Copper Washers (M5-M14) for Electronic, Automotive, Motorcycles, Marine and Mechanical Use
  • 325 PCS Crush Copper Washers Assortment Kit; 10 Size Flat Sealing Copper Washers (M5-M14) for Electronic, Automotive, Motorcycles, Marine and Mechanical Use
  • 325 PCS Crush Copper Washers Assortment Kit; 10 Size Flat Sealing Copper Washers (M5-M14) for Electronic, Automotive, Motorcycles, Marine and Mechanical Use
  • 325 PCS Crush Copper Washers Assortment Kit; 10 Size Flat Sealing Copper Washers (M5-M14) for Electronic, Automotive, Motorcycles, Marine and Mechanical Use
  • 325 PCS Crush Copper Washers Assortment Kit; 10 Size Flat Sealing Copper Washers (M5-M14) for Electronic, Automotive, Motorcycles, Marine and Mechanical Use
  • 325 PCS Crush Copper Washers Assortment Kit; 10 Size Flat Sealing Copper Washers (M5-M14) for Electronic, Automotive, Motorcycles, Marine and Mechanical Use
  • 325 PCS Crush Copper Washers Assortment Kit; 10 Size Flat Sealing Copper Washers (M5-M14) for Electronic, Automotive, Motorcycles, Marine and Mechanical Use
  • 325 PCS Crush Copper Washers Assortment Kit; 10 Size Flat Sealing Copper Washers (M5-M14) for Electronic, Automotive, Motorcycles, Marine and Mechanical Use
  • 325 PCS Crush Copper Washers Assortment Kit; 10 Size Flat Sealing Copper Washers (M5-M14) for Electronic, Automotive, Motorcycles, Marine and Mechanical Use
  • 325 PCS Crush Copper Washers Assortment Kit; 10 Size Flat Sealing Copper Washers (M5-M14) for Electronic, Automotive, Motorcycles, Marine and Mechanical Use
  • 325 PCS Crush Copper Washers Assortment Kit; 10 Size Flat Sealing Copper Washers (M5-M14) for Electronic, Automotive, Motorcycles, Marine and Mechanical Use
Copper Crush Washer Assortment with 325 Metric Seals in 10 Sizes and Transparent Storage Case

Copper Crush Washer Assortment with 325 Metric Seals in 10 Sizes and Transparent Storage Case

$30.99
$30.99
Size

A copper crush washer assortment provides heat-resistant, conductive sealing surfaces for compatible electronic, automotive, motorcycle, marine, hydraulic and mechanical connections. Red copper compresses beneath correctly matched screws, nuts or bolts to distribute pressure, reduce friction and help limit leakage or loosening.

The featured kit contains 325 flat washers in 10 M5–M14 sizes, organized by dimension in a transparent portable case. Copper 120-piece and stainless-steel 108 or 300-piece variants are also available, letting you select the material and assortment size that fits the planned repair inventory.

Specifications

  • Product: metric crush washer assortment
  • Featured material: red copper
  • Featured quantity: 325 washers
  • Featured sizes: 10
  • Size counts: M5 x 9 x 1 mm 55; M6 x 10 x 1 mm 40; M6 x 12 x 1 mm 30; M8 x 12 x 1 mm 30; M8 x 14 x 1 mm 30; M10 x 14 x 1 mm 30; M12 x 16 x 1 mm 30; M12 x 18 x 1.5 mm 30; M14 x 18 x 1 mm 30; M14 x 20 x 1 mm 20
  • Outside diameter range: 9–20 mm
  • Thickness range: 1–1.5 mm
  • Other variants: copper 120 pieces; stainless steel 108 or 300 pieces
  • Storage: transparent case with size chart
  • Functions: pressure distribution, friction reduction and sealing in compatible assemblies
  • Uses: electronic, automotive, motorcycle, marine, hydraulic, machinery, plumbing and household work
  • Case dimensions: 5.35 x 3.81 x 0.7 inches
  • Part: Flat_Washer_001

Frequently Asked Questions

Which sizes come in the featured copper kit?

The 325-piece assortment contains 10 metric washer dimensions across M5, M6, M8, M10, M12 and M14 fastener sizes, with counts listed in the case chart.

Why use a copper crush washer?

Red copper conducts heat and compresses under correctly applied fastener force, helping distribute pressure and support a tight seal in compatible mechanical connections.

Are stainless-steel washer options available?

Yes. Variants include stainless-steel assortments with 108 or 300 pieces, plus copper assortments with 120 or 325 pieces.

How are the metric washers stored?

A durable transparent case separates the dimensions and includes a detailed size table, making the correct copper washer easier to identify and carry.

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