--- product_id: 126962275 title: "Copper Washers Assortment Kit" brand: "toolwiz" price: "£18.70" currency: GBP in_stock: true reviews_count: 13 category: "Toolwiz" url: https://www.desertcart.co.uk/products/126962275-copper-washers-assortment-kit store_origin: GB region: United Kingdom --- # 16MPa max pressure seal 350°C max heat endurance 150PCS versatile sizes Copper Washers Assortment Kit **Brand:** toolwiz **Price:** £18.70 **Availability:** ✅ In Stock ## Summary > 🔧 Seal smarter, not harder — the copper standard for pros! ## Quick Answers - **What is this?** Copper Washers Assortment Kit by toolwiz - **How much does it cost?** £18.70 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/126962275-copper-washers-assortment-kit) ## Best For - toolwiz enthusiasts ## Why This Product - Trusted toolwiz brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Multi-Industry Ready:** Perfect for automotive, plumbing, marine, and industrial applications demanding reliable sealing. - • **Organized & Portable:** Compact, transparent 15-compartment case with EPE foam keeps your washers sorted and ready. - • **Complete Copper Coverage:** 150 precision washers spanning 15 popular metric sizes for every sealing need. - • **Premium 100% Pure Copper:** Corrosion-resistant, high conductivity material guarantees a tighter, leak-proof seal. - • **Unmatched Heat & Pressure Resistance:** Withstands up to 350°C and 16MPa, ensuring durability under extreme conditions. ## Overview The Toolwiz 150PCS Copper Washer Assortment offers 15 metric sizes of 100% pure copper washers designed for superior sealing in plumbing, automotive, and industrial applications. Engineered to endure up to 350°C and 16MPa pressure, these corrosion-resistant washers come neatly organized in a portable case, making leak prevention effortless and professional-grade. ## Description Product description Toolwiz Copper Washer Assortment Set, 150 Pieces 15 Sizes Flat Metric Copper Sealing Washers Kit Toolwiz metric sealing washer made of cooper prevents leakage around fasteners on a plumbing fixture, vehicle brake system or hydraulic application to prevent costly fluid leakages on plumbing fixtures and engines. Widely Application Toolwiz copper washer assortment set is perfect for electrical connections on household and commercial appliances, automotive and marine uses in which the power source has a threaded / bolt-type connection. All products are made of 100% pure copper ,with it's quality construction, the metal material will last and remain long lasting over time. With an included sizing chart that serves to identify each compartment, work is quick and easy allowing for quick access. Each set comes with a 15 compartment storage case for easy organization and portability.Upgrade package with EPE Foam sheet to keep your copper washers in order. 150PCS 15 Sizes Assortment Copper Washers Kit Perfect for those fastening jobs that need to hold The copper washers are used with nuts and bolts and provide a greater bearing surface to prevent the nut or bolt head tearing through the fastened material. A cooper washer set (also called sump plug washers) will fit all types of engines, such as generators, marine, cars, machinery and factory. PREMIUM QUALITY – ADD to YOUR BASKET!!! Product details Material: High-quality Copper Specification: High Conductivity, Corrosion Resistant Package Include:1 Box Contains the most 15 popular sizes Copper Washer Assortment Set 100% pure Copper Preventing loosening and dispersion Highly Compatible With Screws Use in Home, Garage, or Automobile Perfect Size Solution Our copper sealing washers cover all the most popular metric sizes to let you work with sump plugs, water, fuel, hydraulic fittings, and more! Box Contains the most 15 popular sizes: QTY - ID x OD x Thickness ( Unit: metric - mm ) 10pcs - M5 x 10 x 1 mm--------------10pcs - M6 x 10 x 1 mm-------------10pcs - M7 x 10 x 1 mm 10pcs - M8 x 11 x 1 mm--------------10pcs - M10 x 16 x 1 mm------------10pcs - M10.5 x 17 x 1.5 mm 10pcs - M11 x 17 x 1.5 mm-----------10pcs - M14 x 18 x 1 mm-----------10pcs - M12 x 20 x 1.5 mm 10pcs - M12.5 x 20 x 1.5 mm---------10pcs - M14 x 20 x 1.5 mm---------10pcs - M15 x 20 x 2 mm 10pcs - M16 x 22 x 2 mm-------------10pcs - M16.5 x 24 x 2 mm---------10pcs - M17.5 x 24 x 2 mm Review: happy - seems to be a nice set happy with it Review: Nice and cheap to have around if you work on your own vehicles - Nice and cheap to have around if you work on your own vehicles ## Features - Material: 100% copper, high conductivity, corrosion resistant copper washer assortment - 150PCS 15 Popular Sizes Sealing Washers Kit, great for sump plugs, water, fuel, and hydraulic fittings - 150 pcs solid copper sump plug washer set. All contained in a compact and see through compartmented plastic case, convenience to use. - Copper Provides a Tighter Seal and Greater Heat Endurance than Steel and Rubber Washers. Max Operation temperature: 350C Max Operation pressure:16MPa Melting point: 1083C - Widely applied in the flange and the connection of the chemical plant, electricity generating station, nuclear power station, and electronic, digital consumer products, hardware, precision instruments, electrical appliances, bearings, air pumps, water pumps, water valves, air cylinder, sealing the high pressure braking systems.ect. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07G5FP73B | | Best Sellers Rank | #25,634 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #9 in Sealing Washers | | Brand | Toolwiz | | Color | Copper | | Compatible Groove Diameter | 16 Millimeters | | Customer Reviews | 4.7 out of 5 stars 1,108 Reviews | | Exterior Finish | Copper | | Fastener Size | M14 | | Fastener Type | Flat Washer | | Finish Types | Natural Metallic | | Grade Rating | Copper | | Item Diameter | 17.5 Millimeters | | Item Thickness | 1 Millimeters | | Item Weight | 0.29 Kilograms | | Manufacturer | kingcompany | | Material | Copper | | Material Type | Copper | | Metal Type | Copper | | Model | kupfer unterlegscheiben flach | | Number of Pieces | 150 | | Outside Diameter | 20 Millimeters | | Part Number | ASR0271RD | | Screw Head Style | Flat | | Size Name | 5mm to 17.5mm | | UPC | 696177827450 | | Unit Count | 1 Count | | Washer Type | Flat | ## Product Details - **Exterior Finish:** Copper - **Fastener Size:** M14 - **Material:** Copper - **Outside Diameter:** 20 Millimeters - **Washer Type:** Flat ## Images ![Copper Washers Assortment Kit - Image 1](https://m.media-amazon.com/images/I/71f-S0EC2jS.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ happy *by M***N on August 23, 2025* seems to be a nice set happy with it ### ⭐⭐⭐⭐⭐ Nice and cheap to have around if you work on your own vehicles *by R***T on February 17, 2025* Nice and cheap to have around if you work on your own vehicles ### ⭐⭐⭐⭐⭐ Works Good *by N***H on May 21, 2026* Sealed well. Kit included correct diameter and thickness for 1996 Polaris Sportsman 500 engine oil reservoir. Single OEM washer is about 1/2 of the cost of this kit. --- ## 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.co.uk/products/126962275-copper-washers-assortment-kit](https://www.desertcart.co.uk/products/126962275-copper-washers-assortment-kit) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-07-11*