Best M4 Hardware Washers in 2026

Daisy
Last Updated: Jul 17, 2026

At a Glance: Our Top Picks for M4 Hardware Washers

3/8" Stainless Flat Finish Washer (100 Pack), 7/8" OD 18-8 (304) Stainless Steel, Suitable for Factories Repair, Kitchens, Shops, and Outdoor Construction by Bolt Dropper
#TOP1
3/8" Stainless Flat Finish Washer (100 Pack), 7/8"
9.8
PM SCORE
FullerKreg 3/8" x 1" OD Stainless Flat Fender Washers,1" Outside Diameter, 0.080" inch Thickness,(25 Pack),18-8 (304) Stainless Steel
#TOP2
Fullerkreg 3/8" X 1" Od Stainless Flat Fender
9.6
PM SCORE
[20 Pack] 1/2" x 1-1/2" OD Stainless Steel Fender Washer - Choose Size Metal Flat Washers for Bolts (304 Stainless Steel)
#TOP3
[20 Pack] 1/2" X 1-1/2" Od Stainless Steel
9.6
PM SCORE

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Summary of the Best M4 Hardware Washers of 2026

3/8" Stainless Flat Finish Washer (100 Pack), 7/8" Od 18-8 (304) Stainless Steel, Suitable For Factories Repair, Kitchens, Shops, And Outdoor Construction By Bolt Dropper

BOLT DROPPER
3/8" X 7/8" OD STAINLESS FLAT WASHER
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Bolt Dropper 9.88

Features

【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.

【Dimensions】 Inside Diameter: 3/8 Inch | Outside Outside Diameter: 7/8" | 0.078" Thickness | Quantity: 100 pcs | Material: 18-8 (304) Stainless Steel

【Lifetime Guarantee】Bolt Dropper is committed to produce premium quality hardware. We are so confident that our product is the best on the market that we offer a No Hassle Lifetime Guarantee.

Fullerkreg 3/8" X 1" Od Stainless Flat Fender Washers,1" Outside Diameter, 0.080" Inch Thickness,(25 Pack),18-8 (304) Stainless Steel

FULLERKREG
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Fullerkreg 9.81

Features

✔Product Name: Stainless Flat Fender Washers

✔Made from durable stainless steel.

✔Perfect for all indoor/outdoor applications.

✔Used in applications with like nuts and bolts of similar diameter as well as screw products.

✔These fasteners resist loosening caused by vibration and corrosion

#TOP3
Best Washers

[20 Pack] 1/2" X 1-1/2" Od Stainless Steel Fender Washer - Choose Size Metal Flat Washers For Bolts (304 Stainless Steel)

SHKIBY
FENDER WASHERS 9001
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Shkiby Inc 9.91

Features

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.

GREAT TO KEEP AROUND: SHKIBY hardware is great to have around for use in wood and wet environments. SHKIBY 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.

[40 Pack] 1/4" X 1-1/4" Od Stainless Steel Fender Washer - Choose Size Metal Flat Washers For Bolts, 18-8 (304) Stainless Steel

SHKIBY
STEEL FLAT WASHER SKB02
1.25 X 1.25 X 0.05 Inches
0.01 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Shkiby Inc 9.91

Features

NOTE: Please make sure you are purchase from SHKIBY INC. DIMENSIONS: Inside Diameter: 1/4 Inch | Outside Diameter: 1-1/4" | Thickness: 0.050" | Quantity: 40 | Material: 18-8 (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 40 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.

GREAT TO KEEP AROUND: SHKIBY hardware is great to have around for use in wood and wet environments. SHKIBY 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.

100Pcs 1/4" Stainless Flat Washer, Choose Size, 18-8 (304) Stainless Steel 304, By Persberg,(120-9)

PERSBERG
A3040001001F4W
0.50 X 0.50 X 0.20 inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING

Features

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.

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.

LIFETIME GUARANTEE: Try our product Kit with NO risk and 100% money-back guarantee – NO questions asked!

Floyutin 50 Pcs M6X25Mm(Od) Stainless Fender Flat Washer Large For Screw Hardware Lock

FLOYUTIN
FS1B101
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Floyutin 7.80

Features

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.

Including: Contains 50 pcs M6x25mm(OD) 304 Stainless steel flat washers

Material: Made of high quality 304 stainless steel,no magnetic. Smooth polished surface, no sharp edges. rust and corrosion resistance, sturdy and durable.

The Hillman Group 58207 0.750 X 0.385-Inch Nylon Shoulder Washer, 15-Pack

THE HILLMAN GROUP
RNTLS-PN-732117632
1.25 X 2.50 X 1.43 Inches
0.02 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

These washers are thicker compared to their outer diameter than usual, for greater strength and insulation

Have superior wear properties, and are non abrasive with low surface friction characteristics

Helps prevent a nut or bolt head from tearing through the material

Country of Origin: China

150 Pieces 1 Inch Plaster Washers Plaster Buttons Zinc-Plated Flat Washers For Wall Ceiling Drywall Plaster Repair Rings

HOLYMAJI
FW001
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING

Features

Absolutely Superior Quantity: the package comes with 150 zinc-plated plaster washers(screw not included), which measure approx. 1 inches in diameter, ample quantity to meet your daily use needs, or as a backup in case of emergency.

Quality Material: our plaster repair rings are made of steel with galvanized surface, reliable and sturdy, not easy to deform and rust, can serve with confidence for a long time.

Ideal for Fastener Hardware: the middle of the plaster buttons is pre-drilled for the installation of screws, and the back of the plaster buttons is convex for insertion into the surface of the back plate to play a fixed role.

Easy to Store: the metal washers for screws are in small size and lightweight, which can be easily stored in your tool box, occupying a little space, it's also very convenient to take out.

Widely-Use: these drywall repair rings washers are ideal fastener kits for fixing and installing backing boards, foam boards or drywall repair, ceiling plaster repair, Including residential renovation, schools, hotels, apartments and other infrastructure, saving time and effort.

The Hillman Group 58204 0.375 X 0.174-Inch Nylon Shoulder Washer, 25-Pack

THE HILLMAN GROUP
58204
1.65 X 2.46 X 1.43 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

These Washers Are Thicker Compared To Their Outer Diameter Than Usual, For Greater Strength And Insulation

Have Superior Wear Properties, And Are Non Abrasive With Low Surface Friction Characteristics

Helps Prevent A Nut Or Bolt Head From Tearing Through The Material

Country Of Origin: Taiwan, Province Of China

10 Pcs 3"X3" Black Square Washers Plate With Slot Hole, Thickness 4Mm Adjustable Heavy Duty Bearing Plate, Fit 1/2" Bolt, Carbon Steel Base Plate Fastener Hardware

FANMAO
DP04-B-T10
2.99 X 2.99 X 0.16 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Fanmao 6.08

Features

Material: carbon steel Q235B, Surface treatment: electrophoresis

Size: 3x3 inch (76x76mm), Thickness: 4mm

Slide hole size: 44x14mm(1-3/4"x1/2")

Weight: 162g (1 pcs), 1630g (10 pcs)

Square washers can be used in construction sites, machinery and industrial equipment and other related scenes, their applications can be seen in many areas.

Hard-To-Find Fastener 014973305130 Sae Flat Washers, 5/16, Piece-130

HARD-TO-FIND FASTENER
FLWSRS-118-130
4.25 X 2.62 X 1.25 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Diameter 1: 5/16 inches

Diameter 2: 11/16 inches

Material: Steel

Finish: Zinc

Thread size: sae

Diameter: 5/16"

Material: Steel

Finish: Zinc

Thread Size: SAE

Hardness: Grade 2 / A307

10 Pcs Carbon Steel Strut Channel Saddle Washer, 1-5/8" Square Washer Plate C Channel Connector, 4.4Mm Thickness Washer Plate Fastener Hardware, Bolt Not Included

YIDU69Q
ZX12-T10
2.17 X 1.57 X 0.43 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Yilihandu 8.57

Features

Material: carbon steel Q235B, Surface treatment: electrogalvanized,good impact resistance, wear resistance, corrosion resistance.

Product Size:55x40x11.3mm, Thickness: 4.4mm,Hole diameter (1 pcs): φ12.7mm (½ inches)

Fit with steel channel width: 41mm (1⅝ inches)

Application: Saddle washer plate used in strut channel, construction sites, machinery and industrial equipment and other related scenes, and other areas

Package:10 x Saddle Washer Plate Fastener Hardware(Bolt not Included) .

Top 10 hardware washers Brands on Amazon

Here is the list of top-rated brands that were evaluated by PM.

Brand Count
Shkiby 2
The Hillman Group 2
Bolt Dropper 1
Fanmao 1
Floyutin 1
Fullerkreg 1
Hard-To-Find Fastener 1
Holymaji 1
Persberg 1
Yidu69Q 1

Top 10 hardware washers Brands Pie Chart


We've carried out a comprehensive analysis of 6,669 reviews on hardware washers, using our selection criteria to identify the best options in the fasteners. Our findings reveal that most customers typically select hardware washers priced around $9.84, with top brands including wensilon, hardlad, helifouner, ylyl, fullerkreg, small parts, brexxty, vigrue and fastener tree and glarks

Our team of expert editors reviewed these high-quality items and handpicked the top 12 hardware washers for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the fasteners category. These include wensilong, faiq ahmed, helifouner, ylyl direct, fullerkreg, amazon.com, product houze, vigrue-king of screw and dqi supplies and connectors & wire & tools .

We are dedicated to assisting our users in finding the right washers Products based on their needs, saving them considerable time when choosing which hardware washers to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.