Best M12 Flat Washers in 2026

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Diameter 1: 1/4 inch (#14)

Diameter 2: 2 inches

Material: Steel

High Quality Stainless: These 100 Piece Flat Washers are 100% 18-8 (304) Stainless Steel which is one of the highest forms of corrosion resistant steel, making it last longer than other hardware on the market today.

Washers That You Can Depend On: Our hardware is very strong and is great for both indoor and outdoor use. The stainless steel is superior to regular steel and provides excellent rust resistance in water applications.

Great To Keep Around: Bolt Dropper hardware is great to have around for use with sheet metal and wet environments. Bolt Dropper hardware is the highest quality available on the market and we stand by our claim 100%. They are strong, corrosion-resistant and will support all of your projects.

【High Quality Stainless】This Fender Washer is made of 18-8 (304) Stainless Steel which is one of the highest forms of corrosion resistant metals, making it last longer than other hardware on the market today.

【Washers That You Can Depend On】Our hardware is very strong and great for both indoor and outdoor use. The stainless steel is superior to regular steel and provides excellent rust resistance in water applications.

【Great To Keep Around】Bolt Dropper finish washers are great to have around for use in wood and wet environments. Bolt Dropper hardware is the highest quality available on the market and we stand by our claim 100%. Our hardware is strong, corrosion resistant and will support all of your projects.

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

GALVANIZED STAINLESS STEEL: These lock and flat washers provide excellent protection and security for nuts and bolts. They are made with galvanized stainless steel for long-term use and outstanding durability.

VERSATILE & COMPATIBLE: These assorted washers come in multiple sizes to fit all your screws, nuts, and bolts. Each washer features a solid bearing surface to prevent the nut or bolt head from tearing through the material.

OPTIMAL SURFACE AREA: Each stainless-steel flat or lock washer easily deflects the screw or bolt load, spreading the weight evenly for a secure and sure fit. These washers for screws and bolts are ideal for use at home or in the workshop.

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

Quality Type 316 (Marine Grade) Stainless Steel Common Flat Washers

Durable product

This product meets the customer requirement

Manufactured in China

【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.

Durable construction

Measures 3/16-inch

Available in a 30 count

【800 Pcs Washers for Screws】800 Pcs stainless steel flat washers for screws bolts, 9 different sizes M2（210 Pcs) M2.5（200 Pcs） M3（100 Pcs） M4（100 Pcs） M5（70 Pcs）M6（40 Pcs ） M8（50 Pcs ） M10（20 Pcs ） M12（10 Pcs ），Total：800 pcs / 9 different sizes fender washers assortment set kit can meet your different needs.

【Top 304 Stainless Steel】Our assorted hardware Lock metal washers, is made of top 304 stainless steel which has the advantages of high hardness, well wear-resistance, corrosion resistance and rust resistance. Which can ensure long time using even in bad environment like high temperature, cold weather, and high humidity areas.

【Widely Application】Fender washers assortment set kit, perfect for interior decoration, outdoor construction, electrical maintenance and furniture repair, The flat washers could be used for fixing bolts with smaller diameter than the hole of washers.

√ Quantity: 260pcs/set (8 sizes)

√ Material: Stainless Steel, high conductivity, corrosion resistant

√ High conductivity, corrosion resistant copper washer assortment, great for sump plugs, water, fuel and hydraulic fittings

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.

Quality Type 18-8 Stainless Steel Fender Washers

Dimensions: OD 1.0", ID .20", Thickness .04"

Flat Washers Inside Diameter: 1/4", Outside Diameter: 5/8" (15.8mm).Thickness: 0.06"(1.5-1.6mm). These 1/4” washers will fit 1/4 and M6 bolts

Material: Made of 304 Stainless Steel for increased corrosion resistance.

These washers are used to distribute loads of threaded bolts, screws and nuts, provide a smooth-bearing surface

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

Long lasting rubber material

Contains all popular sizes of flat and beveled bibb washers and brass bibb screws

Precision molded of tough neoprene for hot / cold

🔩【Multi-function】XOOL Flat Washer kit is great for odds and ends are when you just need a piece to finish a project. The high quality assortment washers are ideal for home, automotive, and shop use. And the Flat Washer used to spread the load of a screwed fastening. Additionally, the plain washer may be used when the hole is a larger diameter than the fixing nut.

🔩【High Quality】XOOL Flat Washers are made of high quality 304 stainless steel(Raw material). 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.

🔩【Safe & Convenient】XOOL Plain Washers adopt high quality material, which is environmental protection , non- mercury and non-poisonous. In the process of using, there are no toxic substances releasing to ensure your safety. The nice Flat Washer assortment kit has plenty of the popular sizes, which will meet all of your home DIY need. And you don’t need to search for dropped washers, just use one new washer. The 380 pcs washers and 8 different sizes will meet your maximal requirement.

Tough, flexible rubber construction

3/8L trade size -11/16 in. OD

Designed to withstand harsh chemicals

COMPLETE HOME RUBBER WASHER REPAIR KIT: The Danco Home Washer assortment comes with the most popular and widely used washers and includes 42 pieces in various metric and inch standard sizes for your convenience

RUBBER WASHERS - VARIED ASSORTMENT - Includes a varied assortment of washers ranging from faucet washers, hose washers, slip join washers, o-rings, sink strainer washers and bibb screws

SMALL RED WASHERS - The small red washers are specialized for outdoor spigots

MATERIAL: MADE OF 304 STAINLESS STEEL, SMOOTH, NICE AND STRONG, NO RUST

QUANTITY: 200PCS #10 SAE 304 STAINLESS STEEL FLAT WASHERS IN ONE PACKAGE

SIZE: INNER DIAMETER IS: 0.22" (5.68mm), OUTER DIAMETER IS: 1/2" (12.75mm), THICKNESS IS : 0.044" (1.12mm) THESE ARE SAE FLAT WASHERS

√【Kindroufly Combination】: M2 (200 pieces), M2.5 (200 pieces), M3 (100 pieces), M4 (100 pieces), M5 (72 pieces), M6 (50 pieces), M8 (50 pieces), M10 (20 pieces), M12 (8 pieces), total 9 sizes 800pieces, different sizes and enough quantities can meet your different daily needs.

√【High Quality Stainless】: Kindroufly fender washers are made of 304 stainless steel, which have smooth surface, high strength, not easy to deform, corrosion resistance and rust resistance, can ensure a long time using in bad environment like high temperature, cold weather, and high humidity areas.

√【Fender Washers Function】: Flat washers are commonly used to prevent nuts from loosening. Our flat washers are well made, with smooth and shiny surface, highly compatible with screws, nuts and bolts of same sizes and feature solid bearing surface to prevent nut/bolt head from tearing through material.

【Sizes】M2 M2.5 M3 M4 M5 M6 M8 M10 M12, total 900 pieces/9 sizes of the most commonly used black zinc washers, flat washers, metal washers in a plastic case, different size can satisfy your different needs.

【Design】Flat washers, metric washers, metal 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】Black zinc plated steel, 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.