Best M18 Sealing Washers in 2026

【Size】12 sizes 300 pieces copper washers assortment kit, include M5 M6 M8 M10 M12 M14 M16 M20, different sizes can meet your different needs.

【Material】 All flat washers are made of copper, have a tighter seal and high heat resistance than steel and rubber washers. Copper washers are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.

【Functions】Used with nuts and bolts and provide a greater bearing surface to prevent the nut or bolt head tearing through the fastened material, flat washers are used to support and spread the load across the baring area of the bolt and nut to prevent pull through.

{WASHERS APPLICATION}: Plumbing flat washers kit used for home kitchen/ bathroom plumbing faucets shower hand spray hose splitter,shower hose wand, various RV faucet pipe,water supply line, outdoor spigot elbows adapter,outside faucet repair kit replacement.

{O RING APPLICATION}: Rubber o-rings kit used for plumbing faucet repair,pressure washer hose,machinery bearings, pumps, boats, oils, gas control valve,air or Gas water fitting leak seal.

{WASHERS SIZE}: Assorted water hose rubber gaskets assortment kit 6 size OD: 31mm, 24.5mm, 19mm, 15mm, 11mm, 9mm.used to install all standard 1",3/4",1/2",3/8",1/4",1/8" pipe fittings connect.

【STOPPING LEAKS】: If you are trying to fix leaky in faucet, shower head, hose and washing machine, this rubber washer kit is the perfect for you. 20 different sizes of flat rubber washers can be provide a good seal for all connections. WINSTECK makes dripping connections be a thing of the past.

【PERFECT PRODUCT】: WINSTECK rubber hose gaskets fit most standard pipe/hose seal repairs of 1", 3/4", 1/2", 3/8", 1/4", 1/8 inch or 5/8". House faucets, showers, garden hoses and washing machine connections are also included. You will never have to worry about getting the incorrect size again.

【UPGRADED SET】: With this plumbing rubber gasket kit, there are 2 different materials and 6 types to choose from. We upgraded 2 different types of filter washers. One of them is a flat strainer washer and the other is a convex strainer washer which captures more sediment in the water and protects the hose from being clogged by sediment.

√ SIZES - M6 M8 M10 M12 M14 M16 M18 M20

√ PACKAGE - 150pcs ,8 Sizes of the most commonly used flat copper washers in a case

√ COPPER Material - Flat Washers made of copper, have a tighter seal and high heat resistance than steel and rubber washers.

Package of 100 pieces

EPDM rubber (Neoprene) is an extremely durable synthetic rubber membrane

Inside Diameter .25" | Outside Diameter 5/8" | Thickness .145"

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.

★ Tip: These washers NOT compatible with 3/4" garden hose fittings sealing.

★ This product has 3/8-inch inner diameter, 3/4-inch outer diameter, 1/8 inch thickness.

★ Constructed of a strong and durable silicone, construction better sealing, meaning it was built for longevity.

『High Quality Meterial』: All the flat washers are made of copper, which with high conductivity, corrosion resistant. They have a tighter seal and high heat resistance than steel and rubber washers

『Good Performance』: These most commonly used copper washers have superior rust resistance and the excellent of oxidation resistance, which can ensure long time using and prolong screws lifespan, great for sump plugs, water, fuel and hydraulic fittings

『Easy to Use』: 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

Includes wide assortment of rubber sealing washers

Hangable storage case keeps washers clean and organized

Essential plumbing hardware set for pros or DIY - pays for itself saving one trip to hardware store

[Material] These washers are made of high quality rubber material, they are durable and has longer service life.

[Good Sealing] The rubber rings can work greatly as sealing washer and plug washer set, they have good sealing performance, high reliability and great durability.

[Size]1/2": ID11mm/OD19mm; 3/4": ID14mm/24mm; 1": ID21mm/OD31mm.

High Quality:Bonded seal made of zinc plated metal + rubber,high pressure resistant,oil resistant,sturdy and durable for long using life.

Multi size:156pcs bonded seal set includes 10 different metric size, M6-12PCS, M8-12PCS, M10-12PCS, M12-20PCS, M14-20PCS, M16-20PCS, M18-20PCS, M20-20PCS, M22-10PCS, M24-10PCS.

Stylish Desigh:Bonded seal consists of a metal ring and a rubber gasket. The metal washer ensures that the components to be connected are reliably and securely held, rubber ring generally uses oil resistant NBR rubber.

❤ 1, HIGH QUALITY MATERIAL ---- High quality pure copper material, fine workmanship, smooth surface, no burr, durable, long service life, not easy to damage, the material itself luster can be preserved for 10 years and 20 years as new.

❤ 2, WIDE APPLICATION ---- Perfect for Electrical Connections on Household and Commercial Appliances, Automotive and Marine Uses in Which the Power Source Has a Threaded / Bolt-type Connection

❤ 3, EASY TO USE ---- Sturdy and durable, great corrosion resistance for outside applications, easy to install. Flat washers are used to support and spread the load across the baring area of the bolt and nut to prevent pull through

√【Kindroufly Combination】: M5 M6 M8 M10 M12 M14 M16 M20, total 11 sizes 320 pieces copper sealing washers, different sizes and enough quantities can meet your different daily needs.

√【High Quality Copper】: Kindroufly copper washers are high quality copper material, which have smooth surface, wear resistance, corrosion resistance and rust resistance, can ensure a long time using in bad environment like high temperature, cold weather, and high humidity areas.

√【Copper Washers Function】: High conductivity, corrosion resistant copper material provides a tighter seal and greater heat endurance than steel and rubber washers, and play the role of protection and stability Our copper washers are well made, with smooth and shiny surface, highly compatible with screws, nuts and bolts of same sizes.

Product Name: Copper Washer; Inner Diameter: 10mm/0.39" Outer Diameter: 14mm/0.55"; Thickness: 1.5mm/0.06"

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

√【Kindroufly Combination】: M5 M6 M8 M10 M12 M14 M16, total 10 sizes 225 pieces copper sealing washers, different sizes and enough quantities can meet your different daily needs.

√【High Quality Copper】: Kindroufly copper washers are high quality copper material, which have smooth surface, wear resistance, corrosion resistance and rust resistance, can ensure a long time using in bad environment like high temperature, cold weather, and high humidity areas.

√【Copper Washers Function】: High conductivity, corrosion resistant copper material provides a tighter seal and greater heat endurance than steel and rubber washers, and play the role of protection and stability Our copper washers are well made, with smooth and shiny surface, highly compatible with screws, nuts and bolts of same sizes.

Sufficient Quantity: you will receive 40 pieces of neoprene rubber washers, which is about 1 1/2 inch OD x 3/8 inch ID x 1/4 inch thickness, the proper size and enough quantity for you to use

Reliable Quality: made of quality neoprene rubber, these washers for screws are sturdy and flexible, heat resistant and not easy to break, which are reliable to use and can provide you with a long service life

Easy to Use: the rubber flat washer is very easy to install, no need to use extra tools, and you can install it according to the appropriate situation and scene, which is convenient and practical, saving time and effort

Quality material: Made of metal and rubber, good sealing. high pressure resistant, oil resistant, sturdy and durable for long using life

Unique design: Bonded seal consists of a metal ring and a rubber gasket. The metal washer ensures that the components to be connected are reliably and securely held, rubber ring generally uses oil resistant NBR or fluorine rubber.

The assortments contain the following sizes: M6---20pcs,M8---20pcs,M10---20pcs, M12---20pcs, M14---20pcs, M16---20pcs, M18---15pcs, M20---15pcs

DURABLE: These washer rings are made of high quality rubber material for long service life, durable to use.

GOOD PERFORMANCE: The flat rubber washers are resistant to heat, they can provide a better seal and help prevent water leaks.

CONVENIENT TO USE: Sealing o rings are compact in size and light in weight, easy for storage and use.

Product Includes: You will receive 52pcs faucet washers and 6pcs brass bibb screws assortment, perfect repair kit and sufficient quantity meets your use and replacement needs.

Various Specifications: This package includes black flat rubber washers in 10 different specifications and brass bibb screws in 2 styles. You can easily choose the one you need according to the clear size marked on the washers.

Premium Material: These faucet washers are made of quality rubber material, flexible, sturdy and durable, can be used for a long time. Black color is easily match with your faucet and no easy to get dirty. Comes with brass bibb screws for your convenience.

Package Included：you will receive 24 pieces 1/ 2 inch tap connector washers, Outer Diameter: 19 mm/ 0.75 inch, Inner Diameter: 11 mm/ 0.43 inch, Thickness: 2 mm/ 0.08 inch, good sealing, sufficient quantity to meet your different daily usage.

Seal Design: Specially design for good seal ,prevents leaks, abrasion/contact damage.Great for repairing a leaky shower head connection and suitable for replacement for many plumbing and engineering applications.

High-Quality Material: rubber washers are made by good rubber, these sealing rings hose washers are durable and sturdy, have nice heat resistance and good air tightness, not easy to deform, reliable to use with long service life.

💯 What You Get ------- In this kit, You will get 60Pcs 2 Sizes Black and Translucent Water Hose Washer with Screen Filter Assortment Kit, Including Black Rubber Screen Filter Gasket 19x12x3mm: 10Pcs; Translucent Silicone Screen Filter Gasket 19x12x3mm: 10Pcs; Black Convex 19x12x3mm Screen Filter Gasket: 10Pcs. Black Rubber Screen Filter Gasket 24x16x3mm: 10Pcs; Translucent Silicone Screen Filter Gasket 24x16x3mm: 10Pcs; Black Convex 24x16x3mm Screen Filter Gasket: 10Pcs

💯 High Quality Material ------- Black Flat Rubber gasket and White Flat Silicone gasket have High Quality Material, The combination kit is composed of gaskets made of rubber and silicone: silicone, non-toxic, odorless, healthy and environmentally friendly, good elasticity, strong sealing; rubber - high temperature resistance, corrosion resistance, wear resistance, good physical properties.

💯 Wide Applications --------- Suitable for shower heads, faucets, garden hoses, filtering sand and debris to reduce the possibility of nozzle clogging, The gasket of the stainless steel filter screen, as a flow restrictor, can effectively reduce the waste of water.

【You will receive】5 sizes of flat washers, each size has 50 pieces, can meet your different needs

【High quality】These spacers are 100% solid rubber, high temperature resistance, wear resistance, longer service life

【Function】Flat washers are smooth and burr-free, metric sealing washers are mainly used to reduce pressure and friction, prevent leakage, isolate, loosen or disperse pressure

Adequate Quantity: you will be provided with 200 pieces of rubber washers, enough quantity can meet your daily needs and replacement, which can bring much convenience to your life

Quality and Sturdy: made of oil resistant neoprene rubber material, rubber spacer features fine workmanship, tough and wear resistant, sturdy and quality, strong and reliable, not easy to break, can serve you for a long time, so you can apply it confidently in daily usage

Size Details: rubber flat washer measures about 1/2 inch OD x 3/16 inch ID x 1/16 inch thickness, proper size for easy carrying and grasping, make sure to check the size carefully before ordering to avoid unpleasant shopping

Cold/Heat resistance -40℃ to 180℃

Well-known KST brand over 20 years

Made in Taiwan

ROTARY SWITCH CORE PAD-- Flat and smooth, no burrs or gaps, can be for time.

WATER FAUCET WASHER-- Smooth and flat for easy installation, suitable for use in home kitchen/bathroom faucets.

WATER TAP WASHER-- Resistant against high temperature, anti-cold, anti low temperature, not easy to age, wear-resistant and not easy to deform.

Material: Our Sealing Gasket Is Made Of 304 Stainless Steel And Epdm Rubber, Durable And Long Life With Good Rust Resistance, You Do Not Have To Feel Frustrated By Rust

Package Quantity: Our Products Are Strictly Controlled By The Quantity Of Each Package, And Packed In A Strong And Durable Box, You Do Not Have To Worry About Receiving A Broken Package And The Number Of Packages Does Not Match The Actual

Features: The Sealing Washer Is Rubber On One Side And Metal On The Other Side Of The Washer. Suitable For Use In Metal Plates, The Rubber Helps To Solve The Problem Of Vibration Noise, The Gasket Helps To Improve The Friction Of The Screw To Enhance The Sturdiness, They Are Good Helpers For Your Work.

Package & Size：You will receive 100pcs black flat rubber washers in 4 sizes, 25pcs for each size, including 18 x 8 mm/ 0.7 x 0.31in、20 x 10 mm/0.8 x 0.4 in、25 x 7 mm/1 x 0.28 in、30 x 10 mm/1.2 x 0.4in (OD x ID) and each rubber washer is about 2mm/ 0.08in thickness. Enough for your needs of daily use and replacement.

Sealing Function: When compressed against a material, rubber washers prevent water, air or other things from entering or exiting. Round rubber washers also act as a cushion, reducing pressure to increase contact area and prevent damage from vibration.

Sturdy & Reliable Material: Black rubber washers for bolts are made of high quality rubber material, which is flexible and elastic, reliable, not easy to loosen, will not leave scratches, ensuring a long service life.

Size: Inner Diameter: 3mm / 0.12 inch; Outer Diameter: 7mm / 0.28inch; Thickness: 1.2mm / 0.05 inch

Advantage: Rubber washers can be used for sealing applications, i.e. in water, oil, air, etc. They can also be used for cushioning, reducing pressure and friction, increasing the contact area and providing a support surface for fasteners.

Application: Rubber flat washers are widely used in home installations, and household appliances which with bolted connections. It can also be used as a sealing ring for faucet pipes, hose nuts or garden watering tool accessories.

Package Include: In this copper washer set, you can get a total of 160 assorted copper washers, including 12 metric flat washer sizes:M5, M6, M8, M10, M12, M14 M16, M20.

100% Copper Content: All flat washers are made of pure copper. Compared to steel and rubber gaskets, copper gaskets are more resistant to sealing, heat, corrosion and electrical conductivity.

Highly Functional: Copper washers with smooth and shiny surface can reduce the friction between screws and nuts to prevent loosening or disperse their pressure. It can also protect the surface of the connection surface to prevent damage.