Best M12 Flat Washers in 2026

Flat washer provides a bearing surface for fastener load distribution or acts as a spacer

Grade 8 steel is stronger than grade 5 steel and often used in applications where strength is the primary concern

Zinc yellow-chromate plating offers good corrosion resistance

Flat washer provides a bearing surface for fastener load distribution or acts as a spacer

Steel is often used in applications where strength is the primary consideration

Zinc plating resists corrosion and has a reflective appearance

【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.

SIZING: Fits 1/4" fasteners | Inside Diameter: 9/32" | Outside Diameter: 5/8" |Thickness: 0.050" | Quantity: 100 Pieces per package

CERTIFIED STAINLESS STEEL: Made from 18-8 (304) premium stainless steel, our fasteners are tested and certified to ensure the washers you receive are grade 18-8 stainless and meet size specifications.

BLACK OXIDE: These stainless washers are proudly black oxidized in the USA to military specifications, giving the washers a sleek look and added corrosion and abrasion resistance.

100 low profile 60mm Polypropylene washers proudly designed and manufactured by ourselves in the UK, colour black. For fixing and securing Expanded Polystyrene Sheets (EPS), Extruded Polystyrene (XPS) and all types of soft to medium foam boards such as Celotex, Marmox, Kingspan, Stylite and Ecotherm

Low profile only 4.2mm when fixed (5.2mm total depth), 60mm in diameter

Screw size: #12 or #10 (3/16" or 5mm diameter)

【Size】--inner diameter 0.464-0.484inch, outside diameter 0.915-0.937 inch, thickness 0.051-0.080

【Made of Stainless】 --- Completely and infinitely recyclable, stainless steel is the “green material” par excellence. good corrosion resistance, extremely hygienic, easy to maintain, highly durable and offers a wide variety of aspects.

【Widely Applications】 --- Also known as plain washers, their purpose is to distribute the fastener's load while reducing heat and friction during the tightening process. These general use flat washers are positioned under the head of a bolt or nut in order to provide a smooth bearing surface and distribute the fastener load over a wider area.

☑️ PREMIUM QUALITY - These washers are brass-plated for paper fasteners. Brass is an alloy made of copper and zinc, and it is a material that gets used for its low-friction properties in a wide range of applications.

☑️ GREAT VALUE - 100 washers per pack. Buy this item in bulk then you're almost always saving money on each use of that product.

☑️ VERSATILE - Not only do they act as a smooth barrier to reduce friction between two surfaces, but washers can also act as a spring, a locking device, and a wear pad.

Larger surface area than standard flat washers

Increased outer diameter to disperse pressure

Commonly used in sheet metal work, plumbing and electrical applications

【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.

【Flat Washer Size】➤120Pcs 1/4" x 1" Stainless Fender Flat Washers.Inside Diameter:1/4";Outside Diameter: 1" ;Thickness: 1.2mm.

【High Quality Material】➤Flat fender washer is made of high quality 304 stainless steel,Stainless steel material features strength and offers good corrosion resistance in bad environment like high temperature, cold weather, and high humidity areas.They have superior rust resistance and excellent oxidation resistance, which can ensure long time using.

【Design Feature】➤The flat washer which is used to distribute the fastener's load while reducing heat and friction during the tightening process.This prevent nuts,bolts or screws from pulling through base material.

✔Product Name: Stainless Flat Fender Washers

✔Made from durable stainless steel.

✔Perfect for all indoor/outdoor applications.

【Flat Washer Size】➤50Pcs 3/8" x 1" Stainless Fender Flat Washers.Inside Diameter:3/8";Outside Diameter: 1";Thickness: 0.08".

【High Quality Material】➤Flat fender washer is made of high quality 304 stainless steel,Stainless steel material features strength and offers good corrosion resistance in bad environment like high temperature, cold weather, and high humidity areas.They have superior rust resistance and excellent oxidation resistance, which can ensure long time using.

【Design Feature】➤The flat washer which is used to distribute the fastener's load while reducing heat and friction during the tightening process.This prevent nuts,bolts or screws from pulling through base material.

【Sizes】M3 M4 M5 M6 M8 M10 M12, total 240 pieces/15 sizes of the most commonly used stainless steel washers in a plastic case, different size can satisfy your different needs.

【Design】Flat washers are designed for electrical connections on household and commercial appliances, automotive and marine uses in which the power source has a threaded/bolt-type connection.

【Material】304 Stainless Steel, stainless steel material which have good corrosion resistance in bad environment like high temperature, cold weather, and high humidity areas. They have superior rust resistance and excellent oxidation resistance, which can ensure long time using.

1. 304 Stainless Steel Spring Lock Washers Set，Good Corrosion Resistance, It Can Be Used in a Humid Environment.

2. 7 Most Used Sizes: M2.5 M3 M4 M5 M6 M8 M10, Flat & Lock

3. 260 Pieces，Packed in A Sturdy Transparent Plastic Case

√ Size : M2 (120pcs), M2.5 (120pcs), M3 (120pcs), M4 (120pcs), M5 (80pcs), M6 (56pcs), M8 (50pcs), M10 (22pcs), M12 (12pcs), total 9 different sizes can meet your different needs.

√ Material: High Quality 304 Stainless Steel, the 304 stainless steel material features strength and offers 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, which can ensure long time using.

√ Feature: Weak Magnetic, the magnetic properties of 304 stainless steel due to the structure transformation reasons are not at the same level as the magnetic properties of stainless steel of other materials, which means that the magnetic properties of 304 steel always show weak magnetic properties

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

【Many and Varied】Faucet washer kit contains a variety of flat and beveled style washers for commonly used faucets:1/4S 00,1/4M 0,1/4,1/4L,3/8 equipped with brass screws not easy to corrosion.Made of high quality precision molded black durable neoprene rubber,designed to stop water leaking from hot/cold faucets

【High Quality】Designed specifically for repairing leaky external faucets,the neoprene rubber sealed faucet gasket.Wear resistant,oil resistant,high temperature resistant these flat and beveled outside faucet washers are made to last

【Easy to Use and Cheap】Perfect faucet washers repair kit,enough to cover your replacement requirements as well as a replacement part.Great addition to your home and tool kit,this is an inexpensive alternative that will save you from having to repair expensive faucets

★『Product Type』: High quality large penny fender washers assortment set.

★『High Quality Meterial』: All the flat washers are made of 304 stainless steel, which offers 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.

★『Easy to Use』: They are very easy to install, the washer's surface are smooth can reduces friction between the fasteners, prevents leakage, isolates, prevents loosening or dispersion pressure.

The flat design allows a full flow of water as well as provides positive shut-off, abrasion resistance and temperature resistance

These danco flat faucet washers can help you repair your leaky faucet

Flat faucet washers are used most on quick opening styles of Faucets

【Different Sizes of Flat Washer】The nylon flat washer assortment kit contains 8 different common used sizes including M2, M2.5, M3, M4, M5, M6, M8 and M10. You can choose the suitable flat washer according to your diverse screws and bolts.

【High-quality Material】 Made of Nylon, flat washers are wear-resisting and moisture resistant, ensuring long lasting service life. In addition, you can rest assured that the flat washer will prevent electrical shorts between metal and metal.

【Wide Range of Applications】 Our flat washer can effectively serve as a bearing surface for fastener load distribution and resistance to abrasion. In this way, it is perfect for threaded/bolt-type connections on both commercial and household appliances, such as aerospace industry, interior decoration and fitness equipment.

[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

Zinc coating for a corrosion resistant finish

USS coarse washers for coarse threaded bolts

Washers are used to increase the pressure a bolt or screw provides

Size:M8

Inner diameter：0.3”/8mm; Outer diameter:0.6”/16mm; Thickness:0.06”/1.5mm

Steel is often used in applications where strength is the primary consideration

Faucet Washer: Are you still worried about the wear and tear of the gasket and the continuous leakage of the faucet? Ancable faucet washer has a good rubber seal and is specially designed for repairing leaking faucets, suitable for most kitchen faucets or bathroom sink leaking problems.

Easy to Use: Just match the washer size and shape to use. 52 multi-size flat washers and beveled washers with 6 brass screws for better results. Contains 10 different styles of commonly used washers, the size of which is clearly marked on the washer for easy identification and use.

Outstanding Durability: Faucet washer are made of high-quality rubber material, which is durable enough to withstand the rigors of daily use. Equipped with brass screws not easy to corrode. The black finish is low-profile and stain-resistant for long-term use.

These Aluminum Washers Make It Possible To Install 60 Degree Tapered Lug Nuts Against Aluminum Rims With Flat Surface Face

These Are A Must If Switching From Steel Wheels To Aluminum

Material: Aluminum

Size: 3/8 inch X 1 inch OD

Most commonly used and versatile washer

Increases bearing surface and distributes load over a larger area

HIGH QUALITY WEATHER RESISTANT EPDM: Resists damaging ultraviolet radiation from the sun as well as outdoor temperature extremes. The EPDM washers contain superior aging qualities that will stand the test of time and always keep a leak proof seal.

MADE OF EPDM: EPDM is a type of synthetic rubber. It is extremely durable and flexible and therefore has a wide range of applications, including in vehicles (where it is used for window and door seals, as well as cooling system hoses), cold-rooms, non-slip coatings for decks and playgrounds and many others besides. In simple terms, pure rubber becomes brittle with temperature variable, wherein synthetic rubber (EPDM) remain flexible and withstand temperature variations for decades.

EPDM RUBBER: EPDM provide the cross-linking that gives incredible resilience, flexibility and durability. The excellent material properties of EPDM come from this molecular mesh structure and make it unbeatable in terms of elasticity and resistance to ageing.

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

?【Faucet Washers】Good rubber seal, designed to fix leaky faucets, suitable for most kitchen faucets, can help solve bathroom sink leakage. No more worries about worn washers and constant faucet leaking!

?【Easy to Use】Just match washer size and shape and you're ready to go. 52 multi-size flat washers and beveled washers with 6 brass screws for better results. Enough to meet your different daily requirements.

?【Sufficient Amount】Includes 10 different styles of commonly used washers, with washer sizes clearly marked for easy identification and use.