---
product_id: 151253589
title: "420-Pcs [9 Sizes] White/Black Nylon Flat Washer Assortment Set - M2 M2.5 M3 M4 M5 M6 M8 M10 M12"
brand: "rustark"
price: "$3.31"
currency: USD
in_stock: false
reviews_count: 3
url: https://www.desertcart.us/products/151253589-420-pcs-9-sizes-white-black-nylon-flat-washer-assortment
store_origin: US
region: United States of America
---

# durable transparent organizer 320 pcs versatile sizes corrosion-resistant copper 420-Pcs [9 Sizes] White/Black Nylon Flat Washer Assortment Set - M2 M2.5 M3 M4 M5 M6 M8 M10 M12

**Brand:** rustark
**Price:** $3.31
**Availability:** ❌ Out of Stock

## Summary

> 🔩 Seal the deal with copper precision — never settle for less!

## Quick Answers

- **What is this?** 420-Pcs [9 Sizes] White/Black Nylon Flat Washer Assortment Set - M2 M2.5 M3 M4 M5 M6 M8 M10 M12 by rustark
- **How much does it cost?** $3.31 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/151253589-420-pcs-9-sizes-white-black-nylon-flat-washer-assortment)

## 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

- • **All-in-One Size Arsenal:** 12 essential metric sizes (M5-M20) cover every project need with 320 washers ready to deploy.
- • **Confidence-Backed Purchase:** Responsive 12-hour support and 90-day return policy keep your projects worry-free.
- • **Multi-Industry Power Player:** Ideal for electrical, automotive, marine, and hydraulic fittings—engineered to seal tight and reduce wear.
- • **Premium Copper Craftsmanship:** Red copper material ensures superior heat resistance, conductivity, and long-lasting corrosion protection.
- • **Effortless Organization & Portability:** Compact, labeled transparent box lets you quickly find and carry the perfect washer anywhere.

## Overview

The Rustark 320-Pcs Copper Flat Washers Assortment Kit offers 12 commonly used metric sizes (M5 to M20) in a durable, transparent organizer box. Crafted from high-quality red copper, these washers provide excellent heat resistance, electrical conductivity, and corrosion protection, making them perfect for electrical, automotive, marine, and hydraulic applications. With 320 pieces, easy size identification, and reliable after-sales support, this kit is a must-have for professionals seeking durable, versatile sealing solutions.

## Description

Rustark 420-Pcs [9 Sizes] White/Black Nylon Flat Washer Assortment Set ☛Specifications: 1.Sizes: M2 M2.5 M3 M4 M5 M6 M8 M10 M12 2.Material: Nylon Material 3.Quantity: 420pcs in total, come with durable transparent plastic box 4.Washes Type: Flat Washes 5.Color: White and Black ☛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 us, we will reply you within 12 hours and solve problem for you soon. 3.Advanced Material --- Made of environmentally friendly nylon material, it is corrosion-resistant, high hardness, non-polluting, high temperature resistant, and not easy to rust during use, you can use it with confidence. ☛Package Includes: 60pcs(white+black).....................M2 flat washers 60pcs(white+black)...................M2.5 flat washers 60pcs(white+black).....................M3 flat washers 50pcs(white+black).....................M4 flat washers 50pcs(white+black).....................M5 flat washers 50pcs(white+black).....................M6 flat washers 30pcs(white+black).....................M8 flat washers 30pcs(white+black)....................M10 flat washers 30pcs(white+black)....................M12 flat washers 420Pcs in total, package in an durable box.

Review: Could have more medium sizes - If you need plastic washers, this is a good option, but it really could use more medium/smalll-ish sized washers. It seems to have a lot of tiny and a lot of large sizes, but if you're using it for things like computers or smaller size M3-M5 sort of sizes, there will probably only be one size that fits. There's maybe 15 or 20 of each color though, so it should have enough unless you really need a ton. This is really a good option if you have a lot of different sized bolts or screws that need plastic washers. If you need more of a medium to smaller size, it could have more choices. I'd probably end up ordering individual sized washers in the future.
Review: Easily broken lid hinge defeats the purpose - I wanted an assortment of washers for home improvement projects. This set was inexpensive and seemed to fit the bill. Unfortunately the hinge for the container came broken, due to a flimsy plastic nub that secures the hinge. This unfortunately turns a potentially tidy kit into a mess. The washers themselves seem functional. For what it's worth the same kit is offered with twice as many pieces for a dollar more under the brand name Keadic at the time of writing. It unfortunately has the same chintzy hinge.

## Features

- ✔White/Black Flat Washer ---- We prepare 2 Kinds color white and black nylon flat washers, 210pcs each color, package in durable transparent plastic box, it can ensure that your washers will not collect dust or rot due to rust when not in use.
- ✔Flat Washer Sizes ---- Assortment contains 9 different common used sizes, includes: M2 M2.5 M3 M4 M5 M6 M8 M10 M12, each sizes contain 2 kinds different black and white, you can choose the suitable size and color to meet your different needs.
- ✔Wide Applications ---- Suitable for electrical connections on household and commercial appliances, automotive and marine uses in which the power source has a threaded/bolt-type connection.
- ✔Advanced Material ---- Made of environmentally friendly nylon material, it is corrosion-resistant, high hardness, non-polluting, high temperature resistant, and not easy to rust during use, you can use it with confidence.
- ✔Worry-Free Purchase --- We will provide you with reliable after-sales service. If you have any questions with our product, please feel free to contact us, I will reply you within 12 hours and we will solve them for you soon. Please set your heart at rest to purchase.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07QJ8HYDV |
| Best Sellers Rank | #397,076 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2,076 in Flat Washers |
| Brand | Rustark |
| Customer Reviews | 4.2 out of 5 stars 42 Reviews |
| Exterior Finish | Nylon |
| Fastener Type | Flat Washer |
| Manufacturer | Rustark |
| Material | Nylon |
| Material Type | Nylon |
| Model | R-flat washer |
| Number of Pieces | 420 |
| Part Number | R-flat washer |
| Screw Head Style | Flat |
| Size | 420PCS White/Black Nylon |
| Size Name | 420PCS White/Black Nylon |
| UPC | 787414916003 |
| Washer Type | Flat |

## Product Details

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

## Images

![420-Pcs [9 Sizes] White/Black Nylon Flat Washer Assortment Set - M2 M2.5 M3 M4 M5 M6 M8 M10 M12 - Image 1](https://m.media-amazon.com/images/I/71VDg-8Q7UL.jpg)
![420-Pcs [9 Sizes] White/Black Nylon Flat Washer Assortment Set - M2 M2.5 M3 M4 M5 M6 M8 M10 M12 - Image 2](https://m.media-amazon.com/images/I/71e0mqtEhfL.jpg)
![420-Pcs [9 Sizes] White/Black Nylon Flat Washer Assortment Set - M2 M2.5 M3 M4 M5 M6 M8 M10 M12 - Image 3](https://m.media-amazon.com/images/I/71cecIhVoTL.jpg)
![420-Pcs [9 Sizes] White/Black Nylon Flat Washer Assortment Set - M2 M2.5 M3 M4 M5 M6 M8 M10 M12 - Image 4](https://m.media-amazon.com/images/I/61AM2SfKv-L.jpg)
![420-Pcs [9 Sizes] White/Black Nylon Flat Washer Assortment Set - M2 M2.5 M3 M4 M5 M6 M8 M10 M12 - Image 5](https://m.media-amazon.com/images/I/71VpwfsNKNL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐ Could have more medium sizes
*by A***S on November 24, 2019*

If you need plastic washers, this is a good option, but it really could use more medium/smalll-ish sized washers. It seems to have a lot of tiny and a lot of large sizes, but if you're using it for things like computers or smaller size M3-M5 sort of sizes, there will probably only be one size that fits. There's maybe 15 or 20 of each color though, so it should have enough unless you really need a ton. This is really a good option if you have a lot of different sized bolts or screws that need plastic washers. If you need more of a medium to smaller size, it could have more choices. I'd probably end up ordering individual sized washers in the future.

### ⭐⭐ Easily broken lid hinge defeats the purpose
*by L***S on September 21, 2020*

I wanted an assortment of washers for home improvement projects. This set was inexpensive and seemed to fit the bill. Unfortunately the hinge for the container came broken, due to a flimsy plastic nub that secures the hinge. This unfortunately turns a potentially tidy kit into a mess. The washers themselves seem functional. For what it's worth the same kit is offered with twice as many pieces for a dollar more under the brand name Keadic at the time of writing. It unfortunately has the same chintzy hinge.

### ⭐⭐⭐ Case compartments not sealed
*by L***. on January 11, 2021*

Such a basic thing to get wrong, just make the compartment dividers flush with the lid! There's enough room for the smaller washers to get to other compartments apparently, this is still in the plastic wrap. The washers themselves are fine.

## Frequently Bought Together

- Rustark 320 Pcs Copper Flat Washers Assortment Kit Metric Sealing Washers M5 M6 M8 M10 M12 M14 M16 M20（12 Sizes）
- ZDBB 32 Size 1540 Pcs O Rings Assortment Kit Metric Nitrile Rubber Oring Set with 4 Pick for Automotive Faucet Pressure Washer Plumbing Air or Gas Repair OD 4mm-50mm
- XBVV 378 Pcs NBR Metal Bonded Sealing Washer Assortment Kit M6 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27 M30 Automotive Self-Centred Seal Gasket Repair Set

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.us/products/151253589-420-pcs-9-sizes-white-black-nylon-flat-washer-assortment](https://www.desertcart.us/products/151253589-420-pcs-9-sizes-white-black-nylon-flat-washer-assortment)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-08-20*