---
product_id: 151253589
title: "320 Pcs Copper Flat Washers Assortment Kit Metric Sealing Washers M5 M6 M8 M10 M12 M14 M16 M20（12 Sizes）"
brand: "rustark"
price: "$1000"
currency: MXN
in_stock: true
reviews_count: 8
category: "Rustark"
url: https://www.desertcart.mx/products/151253589-320-pcs-copper-flat-washers-assortment-kit-metric-sealing-washers
store_origin: MX
region: Mexico
---

# 12 versatile metric sizes High-temp resistant copper 320 pcs organized in durable box 320 Pcs Copper Flat Washers Assortment Kit Metric Sealing Washers M5 M6 M8 M10 M12 M14 M16 M20（12 Sizes）

**Brand:** rustark
**Price:** $1000
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal it like a pro — Copper washers that mean business!

## Quick Answers

- **What is this?** 320 Pcs Copper Flat Washers Assortment Kit Metric Sealing Washers M5 M6 M8 M10 M12 M14 M16 M20（12 Sizes） by rustark
- **How much does it cost?** $1000 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/151253589-320-pcs-copper-flat-washers-assortment-kit-metric-sealing-washers)

## Best For

- rustark enthusiasts

## Why This Product

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

## Key Features

- • **Precision Fit for Every Project:** 12 common metric sizes (M5 to M20) cover all your sealing needs with ease.
- • **Confidence with Reliable Support:** Backed by responsive customer service and a 90-day return policy to keep your projects worry-free.
- • **Ultimate Durability & Performance:** Crafted from premium red copper for superior corrosion resistance and high conductivity.
- • **Effortless Organization & Portability:** Comes in a sturdy transparent box with labeled compartments for quick size selection on the go.
- • **Versatile Applications Across Industries:** Perfect for electrical, automotive, marine, and hydraulic fittings—engineered to prevent leaks and protect surfaces.

## Overview

The Rustark 320-Pcs Copper Flat Washers Assortment Kit offers 12 essential metric sizes (M5 to M20) in a durable, transparent organizer box. Made from high-quality red copper, these washers deliver exceptional temperature resistance, corrosion protection, and electrical conductivity. Ideal for a wide range of applications including automotive, marine, and household electrical connections, this kit ensures reliable sealing and surface protection. With 320 pieces and a customer-first 90-day return policy, it’s the smart choice for professionals seeking quality and convenience.

## Description

Rustark 320-Pcs [12 Sizes] Copper Metric Sealing Washers Flat Washers Assortment Kit ☛Specifications: Sizes: M5 M6 M8 M10 M12 M14 M16 M18 M20 Material: High-quality Copper Quantity: 320pcs, come with durable transparent plastic box Washes Type: Flat Washers ☛Why Choose Us: 1.Perfect Packaging --- We provide durable transparent plastic box with some labels, it is very easy for you to distinguish each sizes. 2.After-sale service --- If you still have any questions, please feel free to contact, we will reply you within 12 hours and solve problem for you soon. 3.Advanced Material --- Made of red copper, compare with steel and rubber washers, have a high temperature resistance and high conductivity, tighter seal. ☛Main Features: --- There are 12 kinds common used sizes selected for you, you can choose the suitable one to meet your different needs. --- Ideal for electrical connections on household and commercial appliances, automotive and marine uses in which the power source has a threaded/bolt-type connection --- Flat washers are made of high quality copper material, environmentally friendly, non-toxic, super sturdy and easy to carry. --- Because of the product are very small, so please keep away from children. ☛Package Includes: 40pcs..........................M5*9*1 35pcs..........................M6*10*1 35pcs..........................M6*12*1 30pcs..........................M8*13*1 30pcs........................M10*14*1 30pcs........................M8*14*1 25pcs........................M12*16*1 25pcs........................M14*18*1 20pcs........................M12*18*1.5 20pcs........................M16*20*1.5 15pcs.....................M16*22*1.5 15pcs.......................M20*26*1.5 320Pcs in total, package in an durable box.

Review: Not bad for cheap crush washers (probably from China) - Let's get straight to the point: these are NOT as high quality as the OEM washers that came with your European or Japanese machine. But they are of enough quality to perform the job (namely, provide sealing) at a fraction of the cost. What's more important, the assortment provides sizes that may be simply very hard to get from the OEM. I am overall satisfied with the purchase.
Review: Good product - Very good assortment

## Features

- ✔Various Sizes --- We provide 12 kinds common used sizes for you, including: M5 M6 M8 M10 M12 M14 M16 M20, 320pcs in total, package in an durable transparent box, and you can choose the suitable one to meet your different needs.
- ✔Easy to Install and Carry ---- Come with plastic box, there are many plaids, you can fill it with different sizes, it is very convenient for you to choose size, easy to carry and store, you can carry your products anytime and anywhere, meanwhile, the operation process is simple, it can save your time and energy.
- ✔Copper Material ---- The material of product are made of red copper, compare with steel and rubber washers, have a high temperature resistance and high conductivity, tighter seal, extreme durability, what’s more, it can be stored for a long time in wet environment because of corrosion resistant.
- ✔Wide Applications ---- It can be used for electrical connections, such as: household, commercial appliances, automotive and marine, because of its high conductivity and corrosion resistant, it is very suitable for water, fuel and hydraulic fittings, high quality strong copper flat washers can be used to reduce friction, prevent loosening or dispersing pressure, protect the surface of the connection surface, in case of damage.
- ✔Reliable After-Sales Service ---- We will provide you with reliable after-sales service. If you have any questions about our products, please feel free to contact us, I will reply you within 12 hours, if our products have quality problems in the process of using, we will provide 90 days return service for you. Please set your heart at rest to purchase.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Exterior Finish | Copper |
| Fastener Size | M14 |
| Material | Copper |
| Outside Diameter | 26 Millimeters |
| Size | 320PCS Copper |
| Washer Type | Flat |

## Product Details

- **Exterior Finish:** Copper
- **Fastener Size:** M14
- **Material:** Copper
- **Outside Diameter:** 26 Millimeters
- **Washer Type:** Flat

## Images

![320 Pcs Copper Flat Washers Assortment Kit Metric Sealing Washers M5 M6 M8 M10 M12 M14 M16 M20（12 Sizes） - Image 1](https://m.media-amazon.com/images/I/71rsuwjNmoL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Not bad for cheap crush washers (probably from China)
*by H***. on September 7, 2020*

Let's get straight to the point: these are NOT as high quality as the OEM washers that came with your European or Japanese machine. But they are of enough quality to perform the job (namely, provide sealing) at a fraction of the cost. What's more important, the assortment provides sizes that may be simply very hard to get from the OEM. I am overall satisfied with the purchase.

### ⭐⭐⭐⭐⭐ Good product
*by A***R on October 12, 2025*

Very good assortment

### ⭐⭐⭐⭐⭐ Nice useful assortment
*by E***M on April 18, 2025*

Nice useful assortment.

## Frequently Bought Together

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*Product available on Desertcart Mexico*
*Store origin: MX*
*Last updated: 2026-01-27*