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.

【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.

【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.

Larger surface area than standard flat washers

Increased outer diameter to disperse pressure

Commonly used in sheet metal work, plumbing and electrical applications

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

🔩【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.

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.

Material: 304 Stainless Steel, corrosion resistant

Size: M2 M2.5 M3 M4 M5 M6 M8 M10 M12

Quantity: It contains 684pcs/9 Sizes of the most commonly used Stainless Steel washers

♛ High Quality Stainless Steel Flat Washers and Spring Lock Washers Kit

♛ Set Includes 8 Most Used Sizes: M2 M2.5 M3 M4 M5 M6 M8 M10

♛ Made of 304 Stainless Steel Material, Very Good Corrosion Resistance, It Can Be Used in a Humid Environment.

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: Stainless Flat Fender Washers

✔Made from durable stainless steel.

✔Perfect for all indoor/outdoor applications.

Item Weight: 6.0 lb

Country of Origin: China

Brand name: Hillman

【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

CORROSION-RESISTANT FINISH: The washers’ zinc plating offers protection against rust and corrosion for durability

INCREASES FASTENER SECURITY: Flat washers are used to increase the pressure a bolt or screw provides in material

DURABLE STEEL: The washers’ durable steel material compliments the zinc finish to increase product-longevity