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.

Quality Type 18-8 Stainless Steel Neoprene Bonded Sealing Washers

【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.

1. Quantity: 20pcs/set (1 sizes: M12)

2. Material: Copper, high conductivity, corrosion resistant

3.High conductivity, corrosion resistant copper washer assortment, Replacement for sump plugs, water, fuel and hydraulic fittings

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.

Product Name: Copper Washer; Inner Diameter: 12mm/0.47"

Outer Diameter: 18mm/0.7"; Thickness: 1.5mm/0.05"

High quality copper washers are constructed to uphold strength and ultimate durability during tough operations.

√ Size:M6 M8 M10 M12 M14 M16 M18 M20

√ Material: Copper, high conductivity, corrosion resistant

√ Quantity: It contains 150pcs/8 Sizes of the most commonly used copper washers

★ 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

Size: 9 size copper flat crush washers, include M5, M6, M8, M10, M12 and M14

Storage Box: 200pcs washers are organized in a sturdy convenient storage case

High Qulity: Made of high quality red copper, provides high temperature resistance, high conductivity and tighter seal; works great in wet environment

【✔】 High Quality Stainless Steel Neoprene EPDM Bonded Sealing Washers Assortment Set

【✔】 Made of 304 Stainless Steel Material, stainless steel has a high resistance to rust and corrosion and may be mildly magnetic

【✔】 Set Includes 6 Most Used Sizes, Works with #6, #8, #10, #12 Size Screws, 【Please See Picture 2 for Specific Dimensional Size】

Sufficient supplies: one package includes many plastic washers in transparent color, enough quantity to meet daily use and replacement

Reliable material: flat washer gasket is made of vinyl material, sturdy, not easy to break or age, wear-resistant, with strong sealing, and can be applied for a long time

Dimension: the outside diameter is 3/4 inch (19 mm), the inside diameter is 1/4 inch (6 mm), thickness is 1/16 inch, this clear washer is designed to work with 3/4 inch (19 mm) standoff cap assemblies

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

🥰【High quality and durable material】URLWALL Flat Washer Set is made of plastic nylon material, smooth without burr. Features: Insulation, heat insulation, wear-resisting corrosion resistance, long service life.

🥰【Full size】It contains 500 Pieces / M2, M2.5, M3, M4, M5, M6, M8, M10 flat wahers.8 different sizes of nylon flat spacer, can meeting your different needs.

🥰【Good protection】Metric sealing NYLON washers mainly used to reduce pressure and friction, prevent leakage, isolate, loosening or disperse pressure.Also to increase contact area, reduce pressure and protect parts and screws.

♛『Excellent Quality』: These washers one side is 304 stainless steel, with high hardness, anti-corrosion and anti-rust; the other side is Neoprene EPDM, which has the abilities of aging resistance, high and low temperature resistance, acid and alkali resistance, ozone resistance and ultraviolet resistance, they are beautiful and practical.

♛『Perfect Combination』: 304 stainless steel combined with EPDM, enhance the fastening effect as well as the function of sealing, provide a lasting seal against air and water, used to prevent leakage, distribute pressure of the bolt or screw, can avoid heat expansion and cold contraction while installing.

♛『Waterproof Washers』: These washers have superior corrosion resistance compared to regular steel washers, perfect used for near salt water, fresh water, wet environments and other wood related projects.

[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

Package Content: You will receive 30pcs clear plastic washer gaskets, packed in a plastic case for easy storage. Sufficient for your daily home use and replacement.

Product Size: Each plastic flat washer measures approximately 18mm/0.7inch in outer diameter, 6mm / 0.24inch in inner diameter and 2mm / 0.08inch in thickness. Standard size for 3/4inch standoff cap components.

Reliable Material: The clear flat washers are made of quality PVC material, sturdy, wear resistant and durable. They have excellent sealing performance and compressive ability, not easy to break, which can provide a long-term service time.

√【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: the package comes with a total of 80 galvanized steel washers (screw not included), which measure approx. 1-1/4 inches in diameter, abundant quantity to satisfy your various use and replacement needs

Reliable Quality: made of quality steel with rust resistant galvanized exterior finish, our foam board washers are reliable and sturdy, not easy to deform or rust, which can serve you for a long time with confidence

Easy to Install: the middle of the 1-1/4 inch washers is designed with a groove for driving screws, and the backside of the washer is convex for inserting into the surface of the back plate, which plays a fixed role

[Size] - 6mm(0.24 Inch) OD M3(0.11 Inch) ID 0.5mm(0.02 Inch) Thickness

[Application] - Used for faucet pipe, hose bolt, valve, or other gardening maintenance or retrofit

[Function] - It can prevent the pipe from leaking and provide positive shut off, stop leaks to save energy

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

Made by high qulaity stainless steel with nbr to ensure the good performance.

Kit includes: M6*10PCS,M8*10PCS,M10*10PCs,M12*20PCS,M14*20PCS,M16*20PCS,M18*20PCS,M20*20PCS,M22*10PCS,M24*10PCS

Have a stroage box easy to use.

Works with #8 and #10 Sized Screws

Used to prevent leakage, distribute pressure of the bolt or screw.

Stainless Steel 18-8 for high corrosion resistance