Best Square Washers of 2025

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Square washers are a versatile and practical hardware accessory that can be found in various industries and applications. These square-shaped washers are designed to distribute the load of a fastener evenly, reducing the risk of damage or loosening. With their unique shape, they offer better stability and prevent rotation, making them ideal for use with square or rectangular bolts and nuts. Square washers are commonly used in construction, automotive, and industrial settings where the integrity and strength of fastening systems are paramount.
At a Glance: Our Top Picks
Top 10 Square Washers
uxcell Square Washer
Introducing the uxcell Square Washer, a set of 20pcs M5x20x20x1.5mm 304 stainless steel square plate washers. Made of high-quality stainless steel, these washers are rust and corrosion-resistant, making them suitable for both indoor and outdoor use. The square shape of these washers provides more contact area for fasteners, offering higher carrying capacity and preventing loosening. They are commonly used in mechanical equipment and wood construction to create more friction when tightening the wood and fix bolts, screws, and other fasteners. With their versatility and durability, these square washers are widely used in construction, plumbing, electrical, automotive, and other industries. When purchasing, make sure to choose the correct size, thickness, and material for your specific application to ensure optimal performance and durability.
Hard-to-Find Fastener 014973151881 Square Washers
Introducing the Hard-to-Find Fastener Square Washers, the perfect solution for your fastening needs. These square washers are made of durable steel, ensuring long-lasting performance. With a diameter of 1/2 inch and a length of 2 inches, these washers provide a secure and reliable fit for your projects. The thickness of 3/16 inches adds extra strength and stability. Whether you're working on a construction project or simply need to secure a piece of furniture, these square washers are a must-have. They are designed to distribute the load evenly, preventing damage and ensuring a tight grip. Upgrade your fastening game with the Hard-to-Find Fastener Square Washers!
Yaocom 20 Pcs Square Washers
The Yaocom Square Washers come in a handy pack of 20, ensuring you have plenty for various tasks, whether at home or in professional settings. Their ideal dimensions make them easy to fit into different fastening projects, providing you with versatility. Made from robust galvanized steel, these washers are built to last, offering you peace of mind against wear and corrosion. You can confidently use them for home renovations, automotive projects, and more, knowing they will hold up over time.
GBGS 20 Pcs Square Washers
The GBGS Square Washers are made from durable carbon steel and feature a hot-dip galvanized surface, ensuring excellent resistance to impact, wear, and corrosion. Each washer measures 1⅝ inches on each side and has a thickness of 2.8mm, providing a sturdy base for your projects. With a hole diameter of 16.8mm, these washers are compatible with 5/8-inch bolts, making them versatile for various applications. Whether you're working on light steel frame housing or machinery, these washers offer reliability and convenience, helping you complete your tasks with confidence.
GYHCHJDZ Squares Washer
Introducing the GYHCHJDZ Square Washer, a heavy-duty plate fastener designed to provide durability and long service life. With its 4.7mm thickness, this washer is resistant to deformation, making it ideal for protecting nuts and preventing them from loosening. Made of high-quality materials, it offers high hardness, anti-corrosion, and anti-rust properties, ensuring a smooth surface without burrs. Whether used in machinery or industrial equipment, this square plate washer provides reliable protection for nuts, making it an ideal buffer hardware. Plus, GYHCHJDZ stands behind their product, offering a refund of 2 times the price if you receive a defective product. Trust in the GYHCHJDZ Square Washer for all your mechanical equipment needs.
LeaGerous 50 Pcs Square Washer
The LeaGerous Square Washer is a high cost-effective hardware made of carbon steel with a galvanized coating, providing good corrosion resistance. It features a thickened 0.18 inch thickness that prevents deformation during installation and prolongs its service life. The washer enlarges the contact surface between the nut and the connected piece, protecting the surface from damage. Additionally, it offers cushioning and shock absorption, reducing the impact of equipment vibration on the nut and preventing loosening. With its versatile applications in construction sites, machinery, and industrial equipment, the LeaGerous Square Washer is a reliable choice for various projects.
OTTFF 20 Pack Square Washer Plates
The OTTFF Square Washer Plates are designed specifically for use with 1-5/8” strut channels and fit 1/2” bolts. Each plate measures 1-5/8” x 1-5/8” and has a thickness of 5.6 mm, providing a sturdy and reliable base for your projects. The prepunched 14 mm holes make installation straightforward, saving you time and effort. Made from durable Q235B carbon steel and treated with an electrogalvanized finish, these plates resist corrosion and wear, ensuring long-lasting performance. With a pack of 20, you’ll have plenty of washers for multiple applications.
10 Pack Square Washer Plate
heneng Square Washer Plate is a pack of 10 square washer plates made of carbon steel. These plates are 2"x2" in size with a thickness of 5.4mm. The washer plates are made of Q235B material and are electrogalvanized for added durability. The hole diameter of these washer plates is Φ17.8mm (5/8 inches), making them suitable for use with 5/8" bolts. With their square shape and sturdy construction, these washer plates provide excellent support and reinforcement for various applications. Whether you are working on a construction project or repairing furniture, these washer plates will ensure a secure and reliable connection. The pack of 10 plates offers great value for money and is a must-have for any DIY enthusiast or professional.
GBGS Square Plate Washer 3/8"
The GBGS Square Washer is designed with a size of 2 inches by 2 inches and a thickness of 3mm, making it ideal for various applications. Its hole diameter of 10mm accommodates 3/8" bolts, offering you versatility in your projects. Made from low carbon steel, it provides strength and durability while maintaining a plain finish that is easy to integrate into any setting. Whether you're working on light steel frame housing or machinery, these washers ensure secure fastening, giving you peace of mind in your construction and industrial tasks.
LIDSCURA 50 Packs Stainless Steel Washers
The LIDSCURA Stainless Steel Washers are designed for use in mechanical equipment, providing excellent support to reduce vibrations and prevent nuts from loosening. With a thickness of 0.18 inches, these washers are easy to install and are durable enough to maintain their shape during use. Made from 304 stainless steel, they offer superior corrosion and heat resistance, ensuring a long service life. Whether for construction sites or industrial machinery, these washers are versatile and reliable, making your projects smoother and more efficient.
Frequently Asked Questions (FAQs)
1. What are square washers used for?
Square washers are commonly used to prevent rotation, provide corrosion resistance, limit sound levels and vibration, and control electrical current in seismic applications. They can be round or square in shape, with a top-bearing surface that is cut at an oblique angle to compensate for nonparallel surfaces.
2. Are there square washers?
Yes, square washers are available and serve various purposes. Similar to round washers, square washers are used to distribute larger loads. However, they also act as shims and offer the advantage of edge-to-edge contact to resist turning. Additionally, square washers provide a larger bearing surface compared to round washers.
3. What is the difference between a flat washer and a square washer?
The main difference between a flat washer and a square washer is the shape. Square washers can be flat on both sides or beveled on one side and flat on the other. They are often used to prevent pullthrough in applications involving square head bolts and provide a stronger hold and larger surface area compared to standard flat washers.
4. Where are square bevel washers commonly used?
Square bevel washers are commonly used in construction, particularly in applications involving structural beams. When structural beams have angled flanges, square bevel washers are used to securely fix the beams in place.
5. Where are square bevel washers used?
Square bevel washers are specifically used in applications where structural beams are angled. These washers, with their square shape and beveled edges, are designed to secure angled structural beams effectively.
During our square washer research, we found 24 square washer products and shortlisted 10 quality products. We collected and analyzed 4,453 customer reviews through our big data system to write the square washers list. We found that most customers choose square washers with an average price of $21.58.
The square washers are available for purchase. We have researched hundreds of brands and picked the top brands of square washers, including uxcell, Hard-to-Find Fastener, Yaocom, GBGS, GYHCHJDZ. The seller of top 1 product has received honest feedback from 4,359 consumers with an average rating of 4.8.

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.