Best M12 Flat Washers in 2026

Diameter 1: 1/4 inch (#14)

Diameter 2: 2 inches

Material: Steel

【High Quality Stainless】These 100 Piece Steel Flat Washer 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 flat washer 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.

Durable construction

Measures 3/16-inch

Available in a 30 count

【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.

【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.

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

✔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.

Plastic Washers for Insulation: These white plastic caps help distribute the load of a fastener and are used in manufacturing, construction, automobile, and other industries

Universal Compatibility: Our white plastic caps can be assembled with nail sizes #11 - #12 or with #6 - #8 screws

Versatile Usage: Insulation washer is great for installing the roofing felt, rigid board insulation, sheeting, house wrap, and radiant and vapor barriers

Durable rubber construction

Flat faucet washers

Provides positive shut off

DIMENSIONS: Inside Diameter: 1/2 Inch | Outside Diameter: 1-1/2" | Thickness: 0.060" | Quantity: 20 | Material: 304 Stainless Steel.

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.

HIGH QUALITY STAINLESS: SHKIBY 20 Piece Fender 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.

★ Tip: These washers NOT compatible with 3/4" garden hose fittings sealing.

★ This product has 3/8-inch inner diameter, 3/4-inch outer diameter, 1/8 inch thickness.

★ Constructed of a strong and durable silicone, construction better sealing, meaning it was built for longevity.

COMPLETE HOME RUBBER WASHER REPAIR KIT: The flat washer assortment comes with the most popular assortment needed for DIY or professional plumbing repairs

EXCELLENT ASSORTMENT: This faucet washer kit includes various metric and inch standard sizes for your convenience, 10 sizes ranging from 00 to 5/8

REPAIR LEAKY FAUCET - Replacing worn-out washers on a faucet stem helps repair a leaky faucet and is an inexpensive alternative to replacing an entire faucet fixture, saving water, money and expensive plumbing repairs

Sufficient supplies: one package includes many plastic washers in transparent color, enough quantity to meet daily use and replacement

Reliable material: flat washer gasket is made of vinyl material, sturdy, not easy to break or age, wear-resistant, with strong sealing, and can be applied for a long time

Dimension: the outside diameter is 3/4 inch (19 mm), the inside diameter is 1/4 inch (6 mm), thickness is 1/16 inch, this clear washer is designed to work with 3/4 inch (19 mm) standoff cap assemblies

DIMENSIONS: Inside Diameter: 1/4 inch Outside Diameter: 1/2" Nominal Thickness| Quantity: 100 pcs | Material: 18-8 (304) Stainless Steel

HIGH QUALITY STAINLESS: These 100pcs Flat washer 1/4" ID are 100% 18-8 (304) Stainless Steel which are 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.

[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.

Reliable Material: these washers are made of polypropylene, a plastic material, featuring with good insulation, low profile and good durability, which are easy to hold

Size Information: the plastic washers are about 45 mm/ 1.77 inch in diameter, and the middle hole is about 5 mm; Each plastic washer is about 1.7 g

Sufficient to Use: you will get 200 washers for screws and nails, enough for your daily replacement and use in foam board insulation and other repair

Size: 3/8 inch X 1 inch OD

Most commonly used and versatile washer

Increases bearing surface and distributes load over a larger area

[Size] - 6mm(0.24 Inch) OD M3(0.11 Inch) ID 0.5mm(0.02 Inch) Thickness

[Application] - Used for faucet pipe, hose bolt, valve, or other gardening maintenance or retrofit

[Function] - It can prevent the pipe from leaking and provide positive shut off, stop leaks to save energy

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

Works on most project items: These U.S.A. designed round top countersunk finishing washers are made from super-durable proprietary nylon. They are excellent for adding a touch of finishing quality to any KYDEX holster, home improvement project, cabinet work, art project, automotive trim, and much more. They hide the edge of counter sunk flat head beveled screws to create a smooth, safe contact surface while hiding the ugly hole created by most drills.

Designed for beveled head screws: These colored round top finishing washers are 0.530 inch in diameter and feature a 0.375 inch inner bevel diameter. Their through-hole is 0.215 inches in diameter and will fit most common flat head decking screws, upholstery screws, computer cabinet screws, automotive trim screws and much more. These can also be used with other types of screw heads and will hide any underside drill hole that is below their outer diameter in size.

Included in this offer: Each package of HolsterSmith USA designed colored nylon round top finishing washers contains 50 washers in the selected color. The color of these washers are vibrant and throughout the nylon material. Their color cannot be rubbed off or smeared. They resist oil, paint, furniture polish, auto cleaners and other common household cleaning solutions.

Note Size(Appr.): Metric flat washer assortment sets. M6 stands for the inside diameter of washer, means 6mm (1mm=.039 inch) in I.D. ALL washers are SAME thickness(1.5mm), and All washers with a wider outside diameter(25mm) Note Inside Diameter is the hole diameter, outside diameter is the round diameter.

Fast and Easy Use: Crush washers are round and flat with hole. Note the space between the lock nut and nut (1.5mm Thickness). All screws depends on the inside diameter. that means M4 washer fit with M4 screws/bolt shanks.

Multi-purpose Application: Commonly used in household. with threaded bolts, screws, nuts and flat finishing washers to tie together to prevent through. Build and repair furniture, digital products. and so on.

DURABLE: These washer rings are made of high quality rubber material for long service life, durable to use.

GOOD PERFORMANCE: The flat rubber washers are resistant to heat, they can provide a better seal and help prevent water leaks.

CONVENIENT TO USE: Sealing o rings are compact in size and light in weight, easy for storage and use.

Quality Material: these self locking washers are made of low carbon steel and galvanized coating, which feature good insulation performance, strong bearing capacity, strong durability, and are not easy to rust or age

Sufficient Quantity: there are 500 pieces of galvanized steel self locking washers, suitable for large scale work, which can meet your needs at one time, and can also share with those in need

Size Details: locking washers measure about 1.5 inch/ 3.8 cm in diameter, 0.1 inch in center hole diameter, suitable for 12 ga pins

Sufficient Supplies: Include 100 plastic washers gaskets in transparent color, enough quantity to meet daily use and replacement.

Reliable Material: Flat washer gasket is made of vinyl material, sturdy, not easy to break or age, wear-resistant with strong sealing, can be applied for a long time

Dimension: The flat washer gasket thickness is 1/16 inch, outside diameter is 3/4 inch, the inside diameter is 1/4 inch,this clear washer is designed to work with 3/4 inch standoff cap assemblies.

1141 Pieces - Inch & Metric Stainless Steel Hex Nut, Lock Washer and Flat Washer Assortment Kit!

1/4", 5/16", 3/8" 1/2", M6, M8, M10, M12 Diameters Included

Includes: Durham 24 Hole Steel Compartment Tray (Made USA) Dim: 13-3/8"x9-1/4"x2"