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.

【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.

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】

♛『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.

❤ 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.

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

[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.

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.

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

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.

【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.

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.

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: 2.5mm / 0.1 inch; Outer Diameter: 5mm / 0.2inch; Thickness: 1mm / 0.04 inch

Advantage: Nylon 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: Nylon 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.

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.

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.