Best M4 Hardware Washers in 2026

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.

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.

【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.

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

✔Product Name: Stainless Flat Fender Washers

✔Made from durable stainless steel.

✔Perfect for all indoor/outdoor applications.

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.

♛【Package Includes】: It contains 100pcs 8mm x 25mm large fender washers, thickness are 1.2mm. Sufficient quantities can satisfy almost all your needs in daily life and work.

♛【High Quality Material】: All the flat washers are made of high quality 304 stainless steel, which has good performance of high hardness, corrosion resistance and rust resistance even in bad environment like high temperature, cold weather, and high humidity areas, ensures long service time.

♛【Function and Use】: Flat washers are well made, with smooth and shiny surface, which are mainly used to reduce pressure and friction, prevent leakage, isolate, loosening or disperse pressure. Suitable for indoor and outdoor usage.

【Sizes】M2 M2.5 M3 M4 M5 M6 M8 M10 M12, total 600 pieces/9 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】304Stainless 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.

HIGH QUALITY STAINLESS: These 100 Piece Lock 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: Persberg hardware is great to have around for use in wood and wet environments. Persberg washers are 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.

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.

➤SOCELL stainless washers include :M2 M2.5 M3 M4 M5 M6 M8 M10 M12 flat washers.These sizes are often needed.

➤SOCELL stainless steel washers for screws contain 700pieces flat washers and a storage box for quick and easy use.

➤Widely 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

MATERIAL: Assorted washers are manufactured with 304 stainless steel, washer set has the benefits of corrosion resistance, and good wear resistance, and a high level of hardness, which can ensure durability, even in worst weather conditions like rain, humidity, and high temperature

DIMENSIONS: Stainless steel washers comes in 15 different sizes: M3(15x0.8mm), M4(20x1.2mm), M4(25x1.5mm), M5(20x1.2mm), M5(25x1.4mm), M6(20x1.5mm), M6(25x1.5mm), M6(30x1.5mm), M8(20x1.4mm), M8(25x1.5mm), M8(30x1.5mm), M10(20x1.5mm), M10(25x1.5mm), M10(30x1.5mm), M12(24x1.5mm)

QUANTITY: Washers for bolts come in 15 sizes and 225 pieces overall, & each stainless-steel finish washers have a different purpose, and all products require different sizes of the washer. It comes with zip lock to prevent mixing up the sizes in a transparent box

DIMENSIONS: Inside Diameter: 1/2", Outside Diameter: 7/8", Pack of 100, 304 stainless steel.

STAINLESS STEEL: Made from stainless steel for superior corrosion resistance, there're strong and not easy to deform or slip.

LOOSENING PREVENTION: The spring washer offers axial flexibility that's intended to protect fastened assemblies against loosening from vibration.

1. Quantity: 100pcs/set heavy duty

2. Size: 8mm inner diameter, 16mm outer diameter, 1.6mm thickness

3. These 100 Piece Flat Washers are 100% 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.

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.

【Solid STAINLESS STEEL】Made of high quality stainless Steel. Made of corrosion resistant metals, has good corrosion resistance, heat resistance, low temperature strength, making it last longer than other hardware on the market today.

【MULTIPLE Purpose】Square plate washers are often used in timber construction since they develop more friction when tightened against wood. They are also suitable for a variety of applications where a heavy washer is required. It can be used on multiple platforms and facets. Designed to be used in conjunction with carriage bolts for the securing of roof trusses but can also be used in a variety of ways on many different projects

【Package】Inside Diameter: 1/2" | Outside Diameter: 2"*2" | Thickness:1/8"" | Quantity: 50pcs | Material: Stainless Steel.

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.

Product Name: Precision Mold Gap Gasket;length:5m/16.4ft

Material: Made of high quality stainless steel, through heat treatment and fine process, high in hardness and tensile strength.

Main Color: Silver Tone; Material: Stainless Steel,With strong toughness, not easy to break.

Product Name: Precision Mold Gap Gasket;length:3m/9.8ft

Material: Made of high quality stainless steel, through heat treatment and fine process, high in hardness and tensile strength.

Main Color: Silver Tone; Material: Stainless Steel,With strong toughness, not easy to break.

Material: Our Sealing Gasket Is Made Of 304 Stainless Steel And Epdm Rubber, Durable And Long Life With Good Rust Resistance, You Do Not Have To Feel Frustrated By Rust

Package Quantity: Our Products Are Strictly Controlled By The Quantity Of Each Package, And Packed In A Strong And Durable Box, You Do Not Have To Worry About Receiving A Broken Package And The Number Of Packages Does Not Match The Actual

Features: The Sealing Washer Is Rubber On One Side And Metal On The Other Side Of The Washer. Suitable For Use In Metal Plates, The Rubber Helps To Solve The Problem Of Vibration Noise, The Gasket Helps To Improve The Friction Of The Screw To Enhance The Sturdiness, They Are Good Helpers For Your Work.

UNCOMPROMISED QUALITY - While ordinary steel flat washers are of poor quality and fail to abide by their functionality; our premium quality stainless steel washers are made of 304 stainless steel giving them a high tensile strength making it durable for rough and tough conditions

INDOOR AND OUTDOOR REPAIRING - HARDLAD’s flat washer assortment kit have a high-grade manufacturing and are engineered to withstand critical temperatures. These flat washer don't easily loose their properties and shape. Hence a best fit for your personal or professional projects

WE SURPASS PERFECTION- Gone are the days of baring hefty charges just to fix a lose screw or to tighten a hose. With our easy to use washer kit, you will be able to DIY any machine, furniture, sanitary, automotive work etc at anytime.

Product Name: Square Washer; Fit Screw/Bolt Thread Diameter: M3(#5); Inside Diameter: 13.2mm / 0.52"; Outside Size: 40 x 40 x 4mm / 1.57" x 1.57" x 0.16"(L*W*T); Package Content: 2pcs x Square Washers

Material: Square plate washers are made of 304 stainless steel, rust and corrosion-resistant, with good heat and low temperature strength, suitable for indoor and outdoor use.

Advantages: Square washers provide more contact area for fasteners, it is a good choice for applications requiring higher carrying capacity, provide greater stability and prevent loosening.