---
product_id: 413741000
title: "Copper Washers, 150PCS 8 Sizes Copper Metric Sealing Washers Flat Washers Assortment Kit"
brand: "helifouner"
price: "$U3032"
currency: UYU
in_stock: false
reviews_count: 5
category: "Helifouner"
url: https://www.desertcart.uy/products/413741000-copper-washers-150pcs-8-sizes-copper-metric-sealing-washers-flat
store_origin: UY
region: Uruguay
---

# excellent electrical conductivity high heat & corrosion resistance 8 versatile metric sizes Copper Washers, 150PCS 8 Sizes Copper Metric Sealing Washers Flat Washers Assortment Kit

**Brand:** helifouner
**Price:** $U3032
**Availability:** ❌ Out of Stock

## Summary

> ⚙️ Seal the deal with copper confidence — don’t get left leaking behind!

## Quick Answers

- **What is this?** Copper Washers, 150PCS 8 Sizes Copper Metric Sealing Washers Flat Washers Assortment Kit by helifouner
- **How much does it cost?** $U3032 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/413741000-copper-washers-150pcs-8-sizes-copper-metric-sealing-washers-flat)

## 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

- • **Smooth Operator:** Polished surface reduces friction, preventing leaks and loosening under pressure.
- • **Copper Powerhouse:** Superior corrosion and oxidation resistance ensures longevity in harsh environments.
- • **Multi-Industry Ready:** Ideal for automotive, marine, electrical, and hydraulic applications—be the pro who’s always prepared.
- • **Bulk Assortment Advantage:** 150-piece kit means you’re stocked up and ready to tackle any project without delay.
- • **Precision Fit for Every Job:** 8 metric sizes (M6 to M20) cover all your sealing needs with ease.

## Overview

This 150-piece copper washer assortment features 8 metric sizes (M6 to M20) crafted from high-quality copper for superior heat resistance, corrosion protection, and electrical conductivity. Designed for smooth installation, these flat washers reduce friction and prevent leaks, making them essential for automotive, marine, electrical, and hydraulic applications. A must-have kit for professionals demanding reliability and versatility.

## 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: HELIFOUNER 150PCS 8 Sizes Copper Metric Sealing Washers Flat Washers Assortment Kit Warning: small parts, keep away from children and kids.

Review: I use the copper washers for jewellery making and wanted pure copper that I can treat with liver of sulphur to age and tarnish. I can confirm that these rings will tarnish and the effects I've achieved are as exp.
Review: Many sizes.

## 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 |
|---------------|-------|
| ASIN | B07H299LZM |
| Best Sellers Rank | #101,520 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #81 in Flat Washers |
| Brand | HELIFOUNER |
| Exterior Finish | Copper,Rubber,Steel |
| Fastener Size | M6 M8 M10 M12 M14 M16 M20 |
| Item Diameter | 6 Millimetres |
| Item Thickness | 1 Millimetres |
| Item Weight | 249 g |
| Item model number | SLKRWASHER-COPPER--150P |
| Manufacturer | HELIFOUNER |
| Material | Copper |
| Metal Type | Copper |
| Net Quantity | 1 Count |
| Number of Pieces | 150 |
| Outside Diameter | 26 Millimetres |
| Size | M6 M8 M10 M12 M14 M16 M18 M20 |
| UPC | 781573059465 |
| Washer Type | Flat |

## Product Details

- **Exterior Finish:** Copper,Rubber,Steel
- **Fastener Size:** M6 M8 M10 M12 M14 M16 M20
- **Material:** Copper
- **Outside Diameter:** 26 Millimetres
- **Washer Type:** Flat

## Images

![Copper Washers, 150PCS 8 Sizes Copper Metric Sealing Washers Flat Washers Assortment Kit - Image 1](https://m.media-amazon.com/images/I/41e-zGylNvL.jpg)
![Copper Washers, 150PCS 8 Sizes Copper Metric Sealing Washers Flat Washers Assortment Kit - Image 2](https://m.media-amazon.com/images/I/41gQ7wtjmxL.jpg)
![Copper Washers, 150PCS 8 Sizes Copper Metric Sealing Washers Flat Washers Assortment Kit - Image 3](https://m.media-amazon.com/images/I/41idn3zblFL.jpg)
![Copper Washers, 150PCS 8 Sizes Copper Metric Sealing Washers Flat Washers Assortment Kit - Image 4](https://m.media-amazon.com/images/I/51MtqFuAFlL.jpg)
![Copper Washers, 150PCS 8 Sizes Copper Metric Sealing Washers Flat Washers Assortment Kit - Image 5](https://m.media-amazon.com/images/I/51fvgLmCpKL.jpg)

## 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by R***D on 14 June 2022*

I use the copper washers for jewellery making and wanted pure copper that I can treat with liver of sulphur to age and tarnish. I can confirm that these rings will tarnish and the effects I've achieved are as exp.

### ⭐⭐⭐⭐⭐ Review
*by M***R on 2 July 2023*

Many sizes.

### ⭐⭐⭐⭐⭐ Review
*by T***N on 11 January 2020*

I needed just a couple, but this was a good value and since I bought the set, I have used more than just a couple....They serve more than one application and seal very well....If you're doing anything mechanical, you'll run into a need for these sooner than later and pay twice as much for fewer at the stores...Bottom line, g good buy.

## 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 Uruguay*
*Store origin: UY*
*Last updated: 2026-02-03*