Top 10 Best shim washers in 2026

Last Updated - 6/25/2026

🏆Best Choice

KANSPHY

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

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•Flat washer inside diameter: 0.275 Inch, Outside Diameter: 5/8 Inch.Thickness: 0.06 Inch. 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
•Package includes 100Pcs flat washers
•These flat washers fit over 1/4 and M6 bolts. Perfect for indoor and outdoor use

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$5.59

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uxcell

uxcell M10 304 Stainless Steel Flat Washers, 50pcs 10x16x0.5mm Ultra Thin Flat Spacers for Screw Bolt, Electronic Repair, Automotive

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•Size: Fits Screw/Bolt Size: M10; Total Size: 10 x 16 x 0.5mm / 0.39" x 0.63" x 0.02"(Inner Dia*Outer Dia*T).
•Design: Their ultra-thin design makes them suitable for use in tight spaces, and their premium construction ensures they can withstand heavy loads.
•Features: Flat washers can be used with any standard M10 screws or bolts and help distribute the load evenly and prevent damage to surfaces.
•Material: Made of 304 stainless steel material, which is corrosion-resistant and oxidation-resistant, ensuring that the spacers can withstand pressure and tension without deformation or breakage. The pickling passivation surface treatment gives the flat washers a clean, beautiful and shiny finish.
•Applications: These flat washers are versatile and can be used in a variety of applications, including electrical, mechanical, automotive, aerospace, and construction, to provide spacing and support, prevent corrosion, and reduce vibration.

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$7.09

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uxcell

uxcell 100Pcs M5 x 1mm Stainless Steel Metric Flat Washer for Bolt Screw

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•Product Name: Flat Washer; Material: Stainless Steel
•Weight: 53g; Package Content: 100(+/-2%) x Flat Washer
•Main Color: Silver Tone; Inner Dia: 5mm/0.2"
•Outer Dia: 10mm/0.4"
•Thickness: 1mm/0.04"

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$6.99

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GKZKNG

M15x21mm Steel Shim Set 48pcs – Large Diameter Precision Washers 0.1/0.2/0.3/0.5mm for Shaft Spacing, Heavy Equipment, Compatible with M15 Metric Bolts

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•Sized for large components with 15mm inner and 21mm outer diameter
•Made from high-strength steel for consistent performance under pressure
•Four thicknesses provide adjustable solutions for diverse industrial needs
•Ideal for shaft alignment, heavy machinery, and power tool servicing
•Clearly labeled and packaged for quick access and streamlined maintenance work

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$11.99

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PLASMAGAL

Plasmagal - Shim Washers KIT - 40 Units (10 Units x 0,1/0,2/0,3/0,5 mm) (Stainless Steel, 15x21)

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•Stainles Steel A2/304
•Kit 40 units (10 x 0,1/0,2/0,3/0,5 mm)

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$11.99

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Generic

10 Pcs 1/2"(ID) Beveled Square Washers, Plain Carbon Steel Galvanized Wedge Shaped Washer, 1-1/8 x 1-1/8 Inch Metal Shims for Leveling, 2 to 6 mm Thickness, Sliver

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•WASHERS FOR LEVELING: Our square washers are beveled and angled to keep the bolt or nut perpendicular to the bolt shaft, ensuring even pressure and reducing the risk of fastener slippage, loosening or damage
•SUITABLE FOR BEVELED INSTALLATIONS: This steel wedge washer can be used to fasten equipment with incomplete surfaces or inclined machining, providing a flat support surface for the bolt head or nut. Also applied to underlying surface inclined
•HIGH-QUALITY MATERIAL: Made of hardened carbon steel with a protective zinc-plated coating, which is strong and corrosion-resistant, prolonging the service life of the washer and allowing it to be used for a long time in different environments
•WIDE RANGE OF APPLICATIONS: Square beveled washers are commonly used in architectural, mechanical and industrial applications such as bridges, buildings, automobiles or other steel erections where beams and plates often meet at an angle
•PACKAGE CONTENT: 10 pcs washers are included in the package. Each washer has an inside diameter (ID) of 1/2 inch, an outside dimension of 1-1/8 x 1-1/8 inches, and a thickness of 2 to 6 millimeters to ensure even stress

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$7.49

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PLASMAGAL

PlasmaGal - 5/8 x 24 Muzzle Shim Kit for .30/.308/7.62 & 300 BLK Calibers (20 Pieces) Stainless Steel Barrel Washers for Perfect Alignment (4 Units x 5 Thickness - 0.004”/0.008”/0.012”/0.020”/0.040”)

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•Precise alignment on 5/8 × 24 threaded barrels — twenty stainless shims in five calibrated thicknesses (0.004″ 0.008″ 0.012″ 0.020″ 0.040″) let you clock brakes or flash hiders on .30 / .308 / 7.62 mm and 300 BLK sporting platforms with fingertip torque, eliminating disposable crush washers and repeated trial-and-error during installation.
•Fine 0.10 mm correction steps for barrel-nut setups — use a single 0.004″ shim for micro alignment or combine sizes for larger offsets, raising a free-float barrel nut in precise 35- to 173-degree increments, centring gas-tube ports and achieving consistent concentricity without exceeding 90 – 100 ft-lb that can strip threads.
•Reusable 304 stainless steel resists galling, rust and heat — CNC-machined, deburred and bead-blasted to a non-reflective satin finish that won’t deform under torque; remove, clean and reinstall indefinitely so every muzzle device returns to its exact timed position after cleaning, barrel swaps or suppressor checks.
•Clearly labelled, no-mix packaging saves bench time — each thickness ships in an ink-stamped bag with a quick-reference card, letting you grab the right shim instantly, prevent size mix-ups on a crowded workbench and finish builds faster instead of measuring tiny washers with calipers or micrometers.
•Multipurpose shop tool beyond muzzle timing — precision shims level Picatinny rails, space scope-ring bases, true sizing-dies, replace shim-shell assortments in reloading presses and square fixtures on lathes or drill presses, making this 20-piece kit indispensable for builders, tinkerers and accuracy-focused enthusiasts.

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$11.99

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Small Parts

Steel Arbor Shim Assortment Kit, Matte, Full Hard, AISI 1008-1010 For Chemistry, 1'' ID, 1-1/2'' OD (Pack of 19)

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•Contains 1 of each thickness: 0.001", 0.0015", 0.002", 0.003", 0.004", 0.005", 0.006", 0.007", 0.008", 0.010", 0.012", 0.015", 0.020", 0.025", 0.031", 0.047", 0.062", 0.093", and 0.125"
•Made of high quality, low carbon, cold rolled, full hard, steel (either 1008 or 1010)
•Arbor spacers are used for keyed applications; arbor shims have no keyways
•Saves time over re-machining
•Packaged in airtight poly bag

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$12.06

$22.99

-48%

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DVEFSL

1/2" x28 Barrel Shims Kit for .223/5.56 (32 Pack, 8 Thickness Options: .002" to .040",Packaging May Vary)

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•[𝐏𝐑𝐄𝐂𝐈𝐒𝐄 𝐀𝐋𝐈𝐆𝐍𝐌𝐄𝐍𝐓 𝐅𝐎𝐑 𝐌𝐔𝐙𝐙𝐋𝐄 𝐃𝐄𝐕𝐈𝐂𝐄𝐒]: Achieve flawless timing and alignment for your muzzle brake or compensator on 1/2"x28 threaded barrels, commonly used in .223/5.56 calibers.
•[𝐕𝐄𝐑𝐒𝐀𝐓𝐈𝐋𝐄 𝐓𝐇𝐈𝐂𝐊𝐍𝐄𝐒𝐒 𝐎𝐏𝐓𝐈𝐎𝐍𝐒]: This kit includes 32 shims in 8 thicknesses (.002", .003", .004", .008", .01", .02", .03", and .04"), allowing for precise adjustments to meet your specific alignment needs.
•[𝐄𝐅𝐅𝐎𝐑𝐓𝐋𝐄𝐒𝐒 𝐎𝐑𝐆𝐀𝐍𝐈𝐙𝐀𝐓𝐈𝐎𝐍]: Each shim thickness is individually packaged in clearly labeled bags, enabling you to quickly find the right size and eliminating confusion during installation.
•[𝐏𝐑𝐄𝐌𝐈𝐔𝐌 𝐒𝐓𝐀𝐈𝐍𝐋𝐄𝐒𝐒 𝐒𝐓𝐄𝐄𝐋 𝐂𝐎𝐍𝐒𝐓𝐑𝐔𝐂𝐓𝐈𝐎𝐍]: Crafted from high-quality 304 stainless steel, these shims are designed to resist wear and corrosion, ensuring exceptional durability for long-term use.
•[𝐁𝐑𝐎𝐀𝐃 𝐂𝐎𝐌𝐏𝐀𝐓𝐈𝐁𝐈𝐋𝐈𝐓𝐘]: Compatible with a wide range of muzzle brakes and suppressors on 1/2"x28 threaded barrels, this kit guarantees reliable performance across various firearm platforms.

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$15.99

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KALESYUJIN

KALESYUJIN-600PCS M3-M18-0.1 DIN988 Metal Shim Washers Stainless Steel Ultrathin Gasket Thin Flat Washer

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•Various Sizes】0.1MM-0.2MM. 3*6, 4*8, 5*10, 6*12 , 7*13, 8*14, 9*15, 10*16 , 12*18, 13*19, 14*20 15*21, 16*22,17*24, 18*24 600PCS in a box, meet your different needs. Allocating more quantity for the commonly used washers
•【High Quality】--- High Quality 304 Stainless Steel, 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.
•【Feature】--- Weak Magnetic, the magnetic properties of 304 stainless steel due to the structure transformation reasons are not at the same level as the magnetic properties of stainless steel of other materials, which means that the magnetic properties of 304 steel always show weak magnetic properties.
•【Package Included】KALESYUJIN---600PCS M3-M18 Sizes Large Fender Washer are packed into a sturdy transparent box organizer. Not only give you the best fender washers, but also the best storage system for them. Sufficient number to meet your daily use.
•him washers DIN 988 SS are recommended to reduce the axial play arising from manufacturing tolerances. With shim washers, an existing axial backlash can be significantly reduced. They are available with a thicknesses from 0.1 mm. Any thicknesses can made by combining several shim washers.

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$40.00

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