Best Shim Discs of 2025

Brian Howie Avatar
Brian Howie
Last Updated: Jan 2, 2025

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Shim discs are versatile and essential tools used in various industries and applications. These thin, flat circular pieces are typically made from high-quality materials like stainless steel or plastic. Shim discs are designed to fill gaps, adjust clearances, and provide support in machinery and equipment. They are commonly used to align components, prevent wear, and manage vibrations. Whether it's in automotive, aerospace, or manufacturing, shim discs play a crucial role in maintaining precision and ensuring optimal performance.

At a Glance: Our Top Picks

FastCap Mag Shims Cover #TOP 1
FastCap Mag Shims
ftb score rating icon 9.9
Shim U Horseshoes Combo # 3 Cover #TOP 2
Shim U Horseshoes Combo # 3
ftb score rating icon 9.8
Generic Black Plastic Horseshoe Shims Cover #TOP 3
Generic Black Plastic Horseshoe Shims
ftb score rating icon 9.6

Top 10 Shim Discs

#TOP 1

FastCap Mag Shims

Mag_Shim_Standard

FastCap Shims are a versatile set of shim discs that make spacing adjustments quick and easy. With a range from 1/16" to 1-1/8", these shims are perfect for a variety of applications, including table saws, drill presses, and setting router depth. The eight 1/8" shims and two 1/16" shims included in the set provide you with the flexibility to achieve precise spacing in your projects. Whether you need to align materials, create consistent gaps, or fine-tune the depth of your cuts, FastCap Shims have got you covered. These shims are a must-have for any DIY enthusiast or professional woodworker, offering convenience and accuracy in your work.

What We Like
Quick and easy spacing
Versatile for various applications
Precise alignment and spacing
#TOP 2

Shim U Horseshoes Combo # 3

BFSEALS
BF-40C123
Blue - Red - Black
Shim U Horseshoes Combo # 3 Cover
Shim U Horseshoes Combo # 3, 90 Pcs, Different Sizes, Blue-Red-Black Color, Made in USA, Levelers for Windows and Doors, Flat, Spacer, Stackshim, BFSEALS

The BFSEALS Shim U Horseshoes Combo # 3 is a versatile and durable leveling tool designed to make your DIY projects a breeze. Made in the USA with high-quality plastic, these shims are stronger than wood and offer excellent compressive strength. With adjustable thickness and length, you can easily customize them to suit your specific needs. The easy snap feature allows for quick separation, making them convenient to use. Whether you need to level windows, doors, or any other surface, these shims are up to the task. Plus, with free and quick delivery from the USA, you can start your projects without delay. Upgrade your toolbox with the BFSEALS Shim Combo and experience the convenience it brings to your projects.

What We Like
Heavy Duty Leveling
Adjustable and Easy to Use
Excellent Compressive Strength

Generic Black Plastic Horseshoe Shims

Generic
SH38X112X2-100-FBA
Black
Generic Black Plastic Horseshoe Shims Cover
3/8" x 1-1/2" x 2" Black - Plastic Horseshoe Shims - 30 Pack

The Generic Horseshoe Shims are designed for versatility and durability, measuring 2 x 1.5 x 0.375 inches. Made from high-quality polypropylene, these shims are ideal for leveling and stabilizing various surfaces. Their unique horseshoe shape provides extra support, making them perfect for use in construction and home improvement projects. Weighing only 0.64 pounds, these shims are lightweight and easy to handle, allowing you to work with them effortlessly. With a pack of 30, you’ll have plenty of shims on hand for any task that requires precise leveling.

What We Like
Durable polypropylene material
Lightweight and easy to use
Unique horseshoe shape
30-pack for convenience
#TOP 4

GLAZELOCK Assorted Shim Kit

GLAZELOCK
SK01
Assorted
GLAZELOCK Assorted Shim Kit Cover
Assorted Shim Kit with 93 Pieces, Horseshoe and Stacking Shims

The GLAZELOCK Shim Kit is an essential collection for anyone looking to achieve perfect alignment and leveling in various projects. With 92 different shims ranging in thickness from 1/4" to 1/32", you can easily find the right size for your needs. This kit is versatile, making it ideal for leveling doors, cabinets, and even plumbing fixtures. Plus, it comes with a convenient GLAZELOCK pencil to help you mark your measurements. Made from high-quality materials and proudly manufactured in the USA, this kit ensures durability and reliability for all your leveling tasks.

What We Like
Variety of shim thicknesses
Versatile for multiple applications
Includes marking pencil
Durable materials
Made in the USA
#TOP 5

Glazelock Mini Stack Shims

Glazelock
MiniStackSeries
Green
Glazelock Mini Stack Shims Cover
Glazelock Mini Stack Series (Green, 4-3/16"L x 1-7/8"W x 1/32" Thick; 1,120 Shims/Box)

The Glazelock Mini Stack offers a convenient solution for your shim needs. You can easily snap off individual shims to achieve the perfect size for your project, eliminating the hassle of using multiple shims. Designed to fit snugly around bolts and anchors, these shims provide stability and support where you need it most. Plus, being made in the USA ensures quality and reliability. This product is ideal for anyone looking to simplify their work while ensuring precise adjustments.

What We Like
Customizable sizes
Reduces shim clutter
Fits around bolts
Quality USA-made
#TOP 6

Troxell USA Horseshoe Shim Tile Spacer

31-S116
Blue
Troxell USA Horseshoe Shim Tile Spacer Cover
Troxell USA 1/16" Horseshoe Shim Tile Spacer 200 PCS/JAR

The Troxell USA Horseshoe Shim Tile Spacer is a must-have tool for both horizontal and vertical tile installations. With its unique horseshoe shape, it produces a precise 1/16 inch (1.5mm) grout joint, ensuring a professional finish to your tiling projects. The shims are reusable, making them not only cost-effective but also environmentally friendly. The 200 shims come in a reusable tub for easy storage and organization. Made in the USA, this Troxell USA Horseshoe Shim Tile Spacer is a reliable and durable tool that will help you achieve accurate and aesthetically pleasing tile installations.

What We Like
Precise 1/16 inch grout joint
Reusable and eco-friendly
Comes in a reusable tub
#TOP 7

Troxell USA Horseshoe Shim Tile Spacer

31-S316
Troxell USA Horseshoe Shim Tile Spacer Cover
3/16" Horseshoe Shim Tile Spacer (110 PCS/JAR) - Troxell USA

The Troxell Shim Tile Spacer is designed to create a precise 3/16 inch (5mm) grout joint, making your tile installations look professional. Whether you're working on horizontal or vertical surfaces, these shims provide the support you need for a perfect alignment. They are reusable, which not only saves you money but also adds convenience to your projects. Plus, they come packaged in a reusable container, making storage simple and organized. With the Troxell Shim Tile Spacer, you can achieve clean and consistent results in your tiling tasks.

What We Like
Reusable design
Creates precise grout joints
Suitable for horizontal and vertical tiles
Convenient storage container
#TOP 8

FLI Products Glazelock Econo19 Shim

Parent GLZ18-GLZ20
Black
1/8 inch
FLI Products Glazelock Econo19 Shim Cover
Glazelock Econo19 1/8" Thick Shim 3" L x 2 5/16" W with 3/4" Slot U-Shaped Horseshoe Plastic Flat Shims Red (100, 1/8 inch)

The FLI Glazelock Shim is an essential tool for anyone looking to install or level windows, doors, cabinets, and countertops. Its durable construction ensures it won't rot, shrink, or swell, providing you with a reliable option for various projects. You can easily fit these shims around bolts and anchors, ensuring a stable stacking solution that enhances the overall integrity of your installations. Made from high-impact polystyrene plastic, these shims deliver consistent performance and are trusted by professionals across different industries, making them a valuable addition to your toolkit.

What We Like
Durable and weather-resistant
Versatile for various applications
Stable stacking solution
Trusted by professionals
#TOP 9

Hinyefir 1/2x28 Barrel Shim Kit

Hinyefir
Shim
1/2x28
Hinyefir 1/2x28 Barrel Shim Kit Cover
1/2x28 Barrel Shim Muzzle Brake Alignmen Shims Kit, 16 Pcs

The Hinyefir Barrel Shim Kit includes 16 durable stainless steel shims designed specifically for 1/2x28 barrels. These shims are built to resist corrosion and wear, ensuring they last through extensive use. Installation is made easy, as you won’t need to deal with complicated peel-off methods; simply replace the shims quickly when needed. This kit is perfect for those looking to maintain their barrels efficiently while enjoying a long service life from the shims. With high-quality materials and a user-friendly design, you can trust this kit to enhance your firearm's performance.

What We Like
Durable stainless steel construction
Easy installation process
Corrosion and wear resistant
Includes 16 shims
#TOP 10

BARWALT Horseshoe Plastic Shims BWT12020

BWT12020
Black
1/8 Inch
BARWALT Horseshoe Plastic Shims BWT12020 Cover
BARWALT Horseshoe Plastic Shims, Easy Install and Removal, 1/8 Inch, Black, BWT12020

The BARWALT Horseshoe Shims are specifically designed for marble and granite installations, making your projects easier. With four different sizes available, each color-coded for quick identification, you can easily choose the right shim for your needs. The unique horseshoe shape allows you to lift both corners of the material, ensuring that joints are perfectly aligned for a professional finish. Additionally, these shims are user-friendly, allowing for quick installation and removal, which saves you time and effort on the job.

What We Like
Color-coded for easy identification
Quick installation and removal
Ideal for marble and granite
Ensures precise alignment
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What is the purpose of a shim?

The purpose of a shim is to fill small gaps or spaces between objects. It is a thin piece of material that can be tapered or wedged to support, adjust for better fit, provide a level surface, or act as a spacer.

2. What is the difference between a shim and a washer?

While shims and washers may have a similar appearance, they serve different functions. Washers are designed to take and spread loads, while shims are used to fill space and adjust for fit.

3. Are shims and spacers the same thing?

Shims and spacers are not the same. Shims are typically thin and used to fill small gaps, while spacers come in a wider range of thicknesses and can be used as sleeves, bushings, axles, or pins.

4. What are plastic shims used for?

Plastic shims are commonly used to level and adjust surfaces. They can be used for tasks like aligning kitchen cabinets, leveling toilets, spacing and aligning tiles, packing panels for storage, and for external cladding applications.

5. What can I use instead of shims?

Instead of shims, you can consider using EZ-Hang brackets for installing doors. They provide an easier and quicker method, reducing clean-up time compared to traditional shim usage.

6. Do you have to use shims?

Shims are necessary for adjusting the final fittings of windows, doors, cabinets, and more. They are commonly used to bridge gaps when installing trim, doors, windows, or cabinetry projects, and can also help level floors, tables, or chairs.

7. Do you screw through shims?

Once the door or window is plumb and level, you can secure it by driving a nail or screw through the shims and into the framing.

8. Are plastic shims better than wood?

Plastic shims have advantages over wood, such as requiring less shaping and being available in consistent shapes, thicknesses, and material properties. They are also stronger, more durable than wood, and lighter and cheaper than metal.

Editor's Notes

During our shim disc research, we found 24 shim disc products and shortlisted 10 quality products. We collected and analyzed 3,432 customer reviews through our big data system to write the shim discs list. We found that most customers choose shim discs with an average price of $20.90.

The shim discs are available for purchase. We have researched hundreds of brands and picked the top brands of shim discs, including FastCap, BFSEALS, GLAZELOCK, TROXELL USA, FLI Products. The seller of top 1 product has received honest feedback from 251 consumers with an average rating of 4.9.

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.