---
product_id: 180690426
title: "Copper Washers, SELIKOUR 150PCS 8 Sizes Copper Metric Sealing Washers Flat Washers Assortment Kit"
brand: "helifouner"
price: "¥4648"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/180690426-copper-washers-selikour-150pcs-8-sizes-copper-metric-sealing-washers
store_origin: JP
region: Japan
---

# Superior electrical conductivity 8 precise metric sizes High heat resistance Copper Washers, SELIKOUR 150PCS 8 Sizes Copper Metric Sealing Washers Flat Washers Assortment Kit

**Brand:** helifouner
**Price:** ¥4648
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal the deal with copper precision – don’t let your projects leak behind!

## Quick Answers

- **What is this?** Copper Washers, SELIKOUR 150PCS 8 Sizes Copper Metric Sealing Washers Flat Washers Assortment Kit by helifouner
- **How much does it cost?** ¥4648 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/180690426-copper-washers-selikour-150pcs-8-sizes-copper-metric-sealing-washers)

## Best For

- helifouner enthusiasts

## Why This Product

- Trusted helifouner brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Leak-Proof Seal:** Smooth flat washers reduce friction and prevent leaks effectively
- • **Bulk Assortment Pack:** 150 pieces for professional-grade projects without constant reordering
- • **Multi-Industry Ready:** Ideal for automotive, marine, electrical, and hydraulic applications
- • **Versatile Size Range:** 8 metric sizes from M6 to M20 cover every project need
- • **Premium Copper Material:** Corrosion-resistant copper ensures durability and longevity

## Overview

The SELIKOUR Copper Washers Assortment Kit offers 150 high-quality flat washers in 8 metric sizes (M6 to M20), crafted from corrosion-resistant copper. Designed for superior heat resistance and electrical conductivity, these washers provide reliable sealing and friction reduction across automotive, marine, electrical, and hydraulic applications. Perfect for professionals seeking durable, versatile hardware solutions in one comprehensive kit.

## Description

Specification: Material: Copper Quantity: 150 PCS Size: M6 M8 M10 M12 M14 M16 M18 M20  Feature: 1, High quality copper material, with high conductivity, corrosion resistant 2, Good performance of have superior rust resistance and the excellent of oxidation resistance for long time use 3, Easy to install, the washer's surface are smooth can reduces friction between the screw and nut, prevents leakage, isolates, prevents loosening or dispersion pressure 4, Perfect for electrical connections on household and commercial appliances, automotive and marine uses in which the power source has a threaded/bolt-type connection   Package included:  M6 x 12 x 1mm-----------------------30pcs M8 x 14 x 1mm-----------------------30pcs M10 x 16 x 1mm----------------------15pcs M12 x 18 x 1mm----------------------15pcs M14 x 20 x 1.5mm--------------------15pcs M16 x 22 x 1.5mm--------------------15pcs M18 x 24 x 1.5mm---------------------15pcs M20 x 26 x 1.5mm---------------------15pcs   Package Quantity: SELIKOUR 150PCS 8 Sizes Copper Metric Sealing Washers Flat Washers Assortment Kit    Warning: small parts, keep away from children and kids.

## Features

- 【Size】M6 M8 M10 M12 M14 M16 M20, total 8 sizes, different sizes can meet your different needs
- 【Material】Made of Copper, have a tighter seal and high heat resistance than steel and rubber washers
- 【Feature】High conductivity, corrosion resistant copper washer assortment, great for sump plugs, water, fuel and hydraulic fittings
- 【Applications】Used Widely in electrical connections on household and commercial appliances, automotive and marine uses in which the power source has a threaded/bolt-type connection
- 【Package Include】It contains 150pcs/8 Sizes of the most commonly used copper washers, They are very easy to install, the washer's surface are smooth can reduces friction between the screw and nut, prevents leakage, isolates, prevents loosening or dispersion pressure

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | SELIKOUR |
| Part number | SLKRWASHER-COPPER--150P |
| Item Weight | 249 g |
| Package Dimensions | 12.45 x 7.37 x 2.54 cm; 249 g |
| Item model number | SLKRWASHER-COPPER--150P |
| Size | M6 M8 M10 M12 M14 M16 M18 M20 |
| Colour | Bronze |
| Finish | Copper |
| Material | Copper |
| Shape | Flat |
| Item thickness | 1 Millimetres |
| Item Package Quantity | 1 |
| Number of Pieces | 150 |
| Head Style | Flat |
| Measurement System | Metric |
| Batteries included? | No |
| Batteries Required? | No |

## Product Details

- **Material:** Copper
- **Outside diameter:** 26 Millimetres
- **Washer type:** Flat
- **Exterior finish:** Copper
- **Fastener size:** M20

## Images

![Copper Washers, SELIKOUR 150PCS 8 Sizes Copper Metric Sealing Washers Flat Washers Assortment Kit - Image 1](https://m.media-amazon.com/images/I/811LlVOZnXL.jpg)
![Copper Washers, SELIKOUR 150PCS 8 Sizes Copper Metric Sealing Washers Flat Washers Assortment Kit - Image 2](https://m.media-amazon.com/images/I/71seueEbQIL.jpg)
![Copper Washers, SELIKOUR 150PCS 8 Sizes Copper Metric Sealing Washers Flat Washers Assortment Kit - Image 3](https://m.media-amazon.com/images/I/71ox+fnceRL.jpg)
![Copper Washers, SELIKOUR 150PCS 8 Sizes Copper Metric Sealing Washers Flat Washers Assortment Kit - Image 4](https://m.media-amazon.com/images/I/71TzGnJoOZL.jpg)
![Copper Washers, SELIKOUR 150PCS 8 Sizes Copper Metric Sealing Washers Flat Washers Assortment Kit - Image 5](https://m.media-amazon.com/images/I/61loVQ0O1jL.jpg)

## Available Options

This product comes in different **Size Name** options.

## Questions & Answers

**Q: Is this solid copper or copper plated?**
A: I know that that they are solid and not plated because I sacrificed a few with the grinder to make sure. :-)  Note that "solid/not plated" and "solid copper" are somewhat different questions.  One would need to perform a chemical analysis to determine whether they are "solid copper" or "solid copper alloy of some sort."  They are nicely formed and behave like copper; that is good enough for me.

## Frequently Bought Together

- HELIFOUNER Copper Washers, 150PCS 8 Sizes Copper Metric Sealing Washers Flat Washers Assortment Kit
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- HELIFOUNER 50 Pieces M20x26x1.5mm Copper Washers, Copper Metric Sealing Washers, Inner Diameter 20mm, Outer Diameter 26mm, Thickness 1.5mm

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-01-22*