Best Flat Washers of 2026

Brian Howie Avatar
Brian Howie
Last Updated: Feb 2, 2026

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Flat washers are essential components in various mechanical and construction applications, providing a stable surface for fastening. These thin, disk-shaped pieces are typically made from materials like steel, plastic, or rubber, and are designed to distribute load and reduce the risk of damage to surfaces. By preventing loosening and wear, flat washers enhance the durability and reliability of assemblies. Their versatility makes them indispensable in everything from automotive repairs to household projects, ensuring secure connections in countless settings.

At a Glance: Our Top Picks

Hillman 280064 Zinc SAE 1/2" Flat Washer 50-Pack Cover #TOP 1
Hillman 280064 Zinc SAE 1/2" Flat Washer 50-Pack
ftb score rating icon 9.8
VGBUY 275PCS Flat Washers Kit Cover #TOP 2
VGBUY 275PCS Flat Washers Kit
ftb score rating icon 9.7
The Hillman Group 41585 SAE Flat Washer Cover #TOP 3
The Hillman Group 41585 SAE Flat Washer
ftb score rating icon 9.5

Top 10 Flat Washers

#TOP 1

Hillman 280064 Zinc SAE 1/2" Flat Washer 50-Pack

280064
50-Pack
1/2"
Hillman 280064 Zinc SAE 1/2" Flat Washer 50-Pack Cover
Hillman 280064 SAE 1/2-Inch Flat Washer, 50-Pack

The Hillman Zinc SAE Washers come with a zinc coating that helps prevent rust and corrosion, making them durable for long-term use. These washers are designed specifically for coarse threaded bolts, so you can trust they fit perfectly with your hardware. They work by spreading out the pressure from bolts or screws, which helps protect the surface and keeps your fasteners secure. Plus, choosing washers with the same finish as your other fasteners ensures a consistent look and prevents any mismatched corrosion. These washers are ideal for use with 1/2-inch bolts or screws, offering reliability in your projects.

What We Like
Consistent round shape
Appropriate thickness
Bright, stain-free surface
Good steel content
Better value than big box stores
What We Don't Like
Not suitable for thick washer needs
#TOP 2

VGBUY 275PCS Flat Washers Kit

VG40407-278
Silver
VGBUY 275PCS Flat Washers Kit Cover
VGBUY 275PCS Washers Assortment Kit, Thickened 304 Stainless Steel Flat Washers for Screws, Asorted Metal Washers for Bolts, SAE Hardware Washers Set #8, 10, 1/4, 5/16, 3/8, 1/2

The VGBUY Flat Washers assortment kit includes 275 pieces in six different sizes, perfect for various applications. With precise manufacturing, these washers are thickened for enhanced durability, ensuring they withstand pressure and wear. The polished surface of each washer guarantees a smooth finish, making installation easy and effective. Made from high-quality 304 stainless steel, they offer excellent resistance to corrosion and oxidation, allowing you to use them confidently in woodworking and mechanical tasks. This kit is a reliable choice for anyone in need of strong, long-lasting washers.

What We Like
Good quality stainless steel
Heavy duty construction
Best price found
Solid thickness
Works in seawater environment
What We Don't Like
Not 316 stainless steel
#TOP 3

The Hillman Group 41585 SAE Flat Washer

41585
zinc
3/8-Inch
The Hillman Group 41585 SAE Flat Washer Cover
The Hillman Group 41585 SAE Flat Washer, 3/8-Inch, 50-Pack

The Hillman Group 41585 SAE Flat Washer, also known as Hillman Flat Washer, is a pack of 50 washers designed to increase the pressure provided by bolts or screws. With a zinc coating, these washers offer a corrosion-resistant finish, ensuring durability and longevity. These SAE fine washers are specifically designed for coarse threaded bolts, making them suitable for various applications. The Hillman Flat Washer is compatible with 3/8" bolts or screws and comes in a retail package with 50 washers. By using washers that match the finish of your other fasteners, you can maintain a cohesive and professional appearance. Whether you're working on a DIY project or handling professional tasks, these washers provide convenience and reliability.

What We Like
Solid construction
Thick and durable
High quality material
Hard-to-find sizes available
Good value for price
What We Don't Like
Minor description inaccuracy
#TOP 4

The Hillman Group Flat Washers 35010

35010
Silver
1/4 Inch
The Hillman Group Flat Washers 35010 Cover
The Hillman Group 35010 SAE Flat Washers, 1/4-Inch, 100-Pack

The Hillman Flat Washers are essential for anyone looking to enhance the stability of their fasteners. By increasing the surface area under a fastener’s head, these washers effectively distribute the load, preventing any potential damage to the surface beneath. This is particularly useful when you want to avoid bolts or nuts pulling through material, ensuring a secure hold. Made from zinc-plated steel, these washers are durable and resistant to corrosion, making them suitable for various applications. With a pack of 100, you’ll have plenty on hand for your projects.

What We Like
Correct sizing
Heavy duty build
Decent thickness
Bonus washer included
Uniform and solid
What We Don't Like
Not plated finish
Packing sometimes opened
#TOP 5

Bates Stainless Steel 1/4" Fender Washers, 100 pcs

NXJS100B427NP
1/4" x 1"
Bates Stainless Steel 1/4" Fender Washers, 100 pcs Cover
Bates- Stainless Steel Fender Washers, 1/4"x1", 100 pcs, 1/4 Stainless Steel Flat Washers, 1/4 Fender Washer

The Bates 1/4" Fender Washers come in a convenient pack of 100, giving you plenty of washers for multiple projects without needing frequent replacements. Made from durable stainless steel, these washers resist rust and wear, which means they hold up well over time and in tough conditions. Each washer has a 1/4" inner hole and a 1" outer edge, making them versatile for various bolts and screws you might use. The fender design helps spread the load evenly, so you can avoid damaging surfaces and keep your fasteners stable and secure. These features make the washers great for automotive, construction, or home DIY jobs where reliability matters.

What We Like
Thick and heavy stainless steel
Good value for quantity
Smooth edges, quality finish
Versatile for various projects
What We Don't Like
Occasional incorrect shipment
Some bags may be missing one washer
#TOP 6

wegoup 900 Pcs Stainless Steel Washers

9 Sizes 900 Pcs
wegoup 900 Pcs Stainless Steel Washers Cover
WEGOUP 900 Pcs Stainless Steel Flat Washers for Screws, 304 Stainless Steel, Assorted Sizes (M2 M2.5 M3 M4 M5 M6 M8 M10 M12) for Industrial Use, Washers for Bolts

The wegoup Flat Washer Set includes 900 high-quality stainless steel washers in nine different sizes, ensuring you have the right fit for various projects. Made from durable 304 stainless steel, these washers resist wear, corrosion, and rust, making them ideal for both indoor and outdoor use. Whether you're working on furniture repairs or electrical maintenance, the versatility of this assortment set is invaluable. Plus, the organized storage case makes it easy to find the right size quickly, saving you time and effort during your tasks.

What We Like
Wide variety of washer sizes
Stainless steel, rust-resistant
Clearly labeled and organized
Good price value
Consistent fit and thickness
What We Don't Like
Plastic case may get damaged
Small package can spill washers
#TOP 7

1/4" Stainless Flat Washer, 5/8" Outside Diameter, 18-8(304) Stainless Steel Washers Flat (100 Pack) - KANSPHY

FLATWAM6
5/8 inches
1/4" Stainless Flat Washer, 5/8" Outside Diameter, 18-8(304) Stainless Steel Washers Flat (100 Pack) - KANSPHY Cover
1/4" Stainless Flat Washer, 5/8" Outside Diameter, 18-8(304) Stainless Steel Washers Flat (100 Pack)

The KANSPHY Stainless Flat Washer is made of 304 Stainless Steel, providing increased corrosion resistance for both indoor and outdoor use. With an inside diameter of 0.26-0.277 Inch and an outside diameter of 5/8" Inch, these washers are perfect for 1/4 and M6 bolts. They are designed to distribute loads of threaded bolts, screws, and nuts, ensuring a smooth-bearing surface. The 0.06 Inch thickness adds stability and support to your fastening applications. With a package of 100Pcs, you will have an ample supply for your various projects. The KANSPHY Stainless Flat Washer is a reliable and versatile choice for any DIY enthusiast or professional.

What We Like
Corrosion-resistant stainless steel
Excellent durability
Precise sizing and fit
Great value 100-pack
Suitable for indoor and outdoor use
What We Don't Like
Some washers thinner than expected
#TOP 8

Aienxn 550PCS 304 Stainless Steel Flat Washers Kit

Q-040-2
2# -1/2" (550PCS)
Aienxn 550PCS 304 Stainless Steel Flat Washers Kit Cover
Aienxn 550PCS Flat Washers Assortment Kit, 12 SAE Sizes- 1/2, 7/16, 3/8, 5/16, 1/4, 3/16, 12#, 10#, 8#, 6#, 4#, 2#, (18-8) 304 Stainless Steel Washers for Screws, Metal Washers for Bolts

The Aienxn Stainless Steel Washers offer a reliable solution for your fastening needs. Made from durable 304 stainless steel, these washers resist rust and corrosion, ensuring they last long even in tough environments. Their excellent oxidation resistance means they maintain their strength and appearance over time, saving you from frequent replacements. Designed to handle extreme temperatures, these washers are perfect if you work in varying conditions. With a wide range of sizes included, you can easily find the right washer for household appliances, vehicles, or commercial use, making your projects smoother and more efficient.

What We Like
Wide size assortment
High-quality stainless steel
Durable and corrosion resistant
Convenient organized storage
Great value for money
What We Don't Like
Storage case may break
Basic quality in some sets
#TOP 9

Hillman Group 280048 Flat Washer 100-Pack

280048
Silver
7 millimeters
Hillman Group 280048 Flat Washer 100-Pack Cover
The Hillman Group 280048 Number-4 Flat Washer, 100-Pack

The Hillman Flat Washer Pack is designed to help you increase the load area under a bolt or nut, making your fastening more secure and stable. These washers spread out the pressure, which reduces the chance of damage to the surface you're working on. They also add extra support to prevent bolts or nuts from pulling through materials, which is especially useful for softer surfaces. With a narrow design, these washers fit neatly in tight spaces, giving you a clean and efficient fastening solution. Overall, this pack is a handy addition for anyone needing reliable washers for their projects.

What We Like
Load distribution
Surface protection
Prevents pull-through
Narrow design
#TOP 10

Magicave 1100 Pc 304 Stainless Steel Flat Washer Assortment

Flat Washers-304 Stainless Steel
Magicave 1100 Pc 304 Stainless Steel Flat Washer Assortment Cover
1100 Pcs Flat Washers Assortment Kit – 304 Stainless Steel, 9 Metric Sizes (M2–M12), Metal Washers for Screws and Bolts – Ideal for Automotive, Construction, Industrial, and DIY Use

The Magicave Stainless Steel Washers come in a set of 1,100 pieces across nine different metric sizes, giving you flexibility for various fastening tasks. Made from durable 304 stainless steel, these washers resist rust and withstand tough conditions, so you can trust them indoors or outdoors. They help spread the pressure from bolts and nuts evenly, protecting surfaces from damage and improving the strength of your connections. Their design also helps prevent loosening in places with vibration, making them reliable for automotive, construction, or DIY projects. This kit offers you a practical and sturdy solution for many fastening needs.

What We Like
High-quality stainless or copper material
Wide variety of sizes
Organized storage case
Excellent value for price
Reliable performance
What We Don't Like
Some washers less thick
Box may be overfilled
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What is the difference between a flat washer and a SAE washer?

The main difference between a flat washer and a SAE washer is their outer diameter and thickness. SAE flat washers, created by the Society of Automotive Engineers, have a smaller outer diameter and thinner gauges compared to USS (Unified Thread Standard) flat washers. SAE washers are designed to meet the specific requirements of the automotive industry.

2. What is flat vs spring washers?

Flat washers are flat, while spring washers are curved. Flat washers are commonly used in most applications, while spring washers are recommended for machines and objects that experience vibrations. Spring washers provide an axial load that counters vibrations and prevents fasteners from loosening.

3. Should I use a lock washer and a flat washer?

It is common to use a flat washer under a split locking washer to protect the base material or coating from damage caused by the split washer action. Additionally, a flat washer helps distribute the fastener load and prevents the split washer from falling or grinding into larger clearance hole features.

4. What is the difference between Type A and Type B flat washers?

Type A flat washers are steel washers with broad tolerances, suitable for applications where precision is not critical. On the other hand, Type B flat washers have tighter tolerances and are categorized as Narrow, Regular, or Wide based on their outside diameters. Type B washers are used in applications that require more precise dimensions.

5. Should a flat washer be used with a spring washer?

In cases of relatively large loads and vibration loads, it is recommended to use a combination of flat washers and spring washers. Spring washers are typically not used alone, but in combination with other washers to provide the needed locking and stability.

6. When should flat washers be used?

Flat washers are primarily used to increase the bearing surface area of a screw and reduce the surface pressure applied to the fastened object. They help prevent the sinking of the bearing surface under pressure, thus reducing the risk of loosening. Flat washers are particularly effective in reducing surface pressure.

7. When should you use spring washers?

Spring washers, also known as split lock or split ring washers, are used when there is a need to prevent fasteners from loosening due to vibration. They provide a locking effect and help keep the fasteners secure in applications where vibrations are present.

8. When should you not use a lock washer?

Lock washers, like wedge-locking washers, should not be used against soft surfaces such as wood or soft plastic. These soft materials may not be able to hold the serrations of the washer, leading to rotation of the bolt and a compromised bolted joint.

9. Where is the best place to put a lock washer?

A lock washer should be placed under the threaded fastener, either under a nut or the head of a screw or bolt. In assemblies with a nut and bolt, the lock washer should be positioned between the nut and the head of the bolt. This allows for proper tightening of the threaded fastener.

Editor's Notes

During our flat washer research, we found 24 flat washer products and shortlisted 10 quality products. We collected and analyzed 26,574 customer reviews through our big data system to write the flat washers list. We found that most customers choose flat washers with an average price of $6.76.

The flat washers are available for purchase. We have researched hundreds of brands and picked the top brands of flat washers, including Hillman, VGBUY, Bates Choice, wegoup, KANSPHY. The seller of top 1 product has received honest feedback from 384 consumers with an average rating of 4.7.

Written by
Brian Howie Avatar

Brian Howie is a content writer and senior industrial designer. After graduation from Westminster College, he has been engaged in product design and manufacturing for 18 years. Brian Howie has always found great pleasure in designing industrial products and sharing his ideas and experience online.

Flat Washers Comparison Table

#TOP1
#TOP2
#TOP3
#TOP4
#TOP5
#TOP6
#TOP7
#TOP8
#TOP9
#TOP10
Brand Hillman VGBUY Hillman Hillman Bates Choice wegoup KANSPHY Aienxn Hillman Magicave
Material Alloy Steel Stainless Steel Zinc Alloy Steel Stainless Steel Stainless Steel Stainless Steel Stainless Steel Alloy Steel Stainless Steel
Outside Diameter 1 Inches 1.25 Inches 0.75 Inches 0.5 Inches 1 Inches 10 Millimeters 0.63 Inches 0.5 Inches 7 Millimeters M2 M2.5 M3 M4 M5 M6 M8 M10 M12 Inches
Washer Type Flat Flat Flat Flat Fender Flat Flat Flat Flat Flat
Exterior Finish Zinc Stainless Steel Ultra-Corrosion-Resistant Zinc Stainless Steel Stainless Steel Stainless Steel Stainless Steel Zinc Stainless Steel
Fastener Size 1/2" - 3/8" 1/4" M7 M2 M2.5 M3 M4 M5 M6 M8 M10 M12 M6 2# -1/2" M3 M2 M2.5 M3 M4 M5 M6 M8 M10 M12
FTB Score
ftb score rating icon 9.8
ftb score rating icon 9.7
ftb score rating icon 9.5
ftb score rating icon 9.3
ftb score rating icon 9.1
ftb score rating icon 8.9
ftb score rating icon 8.9
ftb score rating icon 8.7
ftb score rating icon 8.7
ftb score rating icon 8.6
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