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.

Quality Type 18-8 Stainless Steel Neoprene Bonded Sealing Washers

√ 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.

『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

【✔】 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】

♛『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.

❤ 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

【STOPPING LEAKS】: If you are trying to fix leaky in hose, faucet, shower head, washer, this hose rubber gasket is the perfect kit for you. Different sizes of flat o-rings can be compressed very well and provide a good seal. WINSTECK makes dripping connections be a thing of the past.

【GREAT SET】: With this plumbing rubber washers assorted kit, you have 2 different materials and 16 sizes to choose from, which can supply different sizes of hose gaskets for your home, garden and farm. These rubber hose washers fit all standard hose fittings, washer, dryer and faucet connectors. You will never have to worry about getting the incorrect size again.

【QUALITY MATERIALS】: Rubber washers & silicone washers are resistant to high and low temperatures. Rubber hose washers are safe and non-toxic, harmless to people, animals and plants. We use 304 stainless steel material to make filter nets to prevent rusting. It not only stops leakage, but also captures the sediment in the well pump and protects the hose from being clogged by sediment.

√【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

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

High Resistance to Rust & Corrosion!

Professional & Dependable Top Quality Type 18-8 Stainless Steel Sealing Washer Assortment Kit

Includes All 8 Neoprene Bonded Sealing Washer Sizes!

💯 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.

Material: The plaster washers are crafted with steel and with zinc plated, which is sturdy and well made, and can serve you for a long time.

Practical plaster washer: The plastic plaster repair rings work well to fix the plaster against the lath, which can prevent or control sagging and cracking from expanding, helping your ceilings and walls maintain in good condition.

Easy to Store: Small size won't occupy much space. Lightweight plaster repair kit allows the metal plaster washers to easily carry or store in a tool case or drawer.

Dimensions: Inner Diameter: 8mm / 0.31"(M8), Outer Diameter:13mm / 0.51", Thickness:1mm / 0.04"

Quantity: It contains 55(+/-2%)pcs stainless steel flat washers gasket.

Material: Made of stainless steel, which have good corrosion resistance in bad environment like high temperature, cold weather, and high humidity areas. They have superior rust resistance and the excellent of oxidation resistance.

Cold/Heat resistance -40℃ to 180℃

Well-known KST brand over 20 years

Made in Taiwan

【Dimensions】 Inner Diameter: 5mm / 0.20"(M5), Outer Diameter:20mm / 0.79", Thickness:1mm / 0.04"

【Quantity】 It contains 55(+/-2%)pcs stainless steel flat washers gasket.

【Material】 Made of stainless steel, which have good corrosion resistance in bad environment like high temperature, cold weather, and high humidity areas. They have superior rust resistance and the excellent of oxidation resistance.

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.

WHAT YOU GET: 100 stainless steel #8x3/8" Spring Lock Washers ideal for use in sheet metal and wet environments with very high form corrosion resistance in 304 material

304 MATERIAL: Our Spring Lock Washers are made of 304 stainless steel, which is longer lasting than other hardware on the market and will last longer in harsh environments such as high temperature, low temperature and high humidity.

WIDELY USED: Our Spring Lock Washers can be used to fix bolts with diameter smaller than the hole of the washer, suitable for general industry such as indoor decoration, outdoor construction, electrical repair and furniture repair.

WHAT YOU GET: 100 stainless steel 1/4"x1 flat pads ideal for use in sheet metal and wet environments with very high form corrosion resistance in 304 material

304 MATERIAL: Our pads are made of 304 stainless steel, which is longer lasting than other hardware on the market and will last longer in harsh environments such as high temperature, low temperature and high humidity.

WIDELY USED: Our flat pad can be used to fix bolts with diameter smaller than the hole of the washer, suitable for general industry such as indoor decoration, outdoor construction, electrical repair and furniture repair.

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.