Best Spring Lock Washers of 2025

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Spring lock washers are essential components in various mechanical and industrial applications. Designed to provide a secure fastening solution, these washers feature a unique design with a split ring that creates tension and prevents loosening under vibration or torque. By distributing the load evenly, they enhance the reliability and longevity of connections, ensuring that bolts and nuts stay in place. With their easy installation and compatibility with different materials, spring lock washers are a reliable choice for professionals in construction, automotive, and other industries where secure fastening is crucial.
At a Glance: Our Top Picks
Top 10 Spring Lock Washers
HELIFOUNER 900-Piece Stainless Steel Washers
The HELIFOUNER Spring Lock Washers come in a comprehensive kit of 900 pieces, featuring nine different sizes ranging from M2 to M12. This variety ensures you have the right size for any project, whether for home appliances or automotive needs. Made from durable 304 stainless steel, these washers offer excellent resistance to corrosion, making them ideal for harsh environments. Additionally, their unique design prevents loosening, providing a secure fit that enhances the longevity of your connections. With weak magnetic properties, they won't interfere with electrical connections, ensuring safe and reliable usage.
binifiMux 1150pcs Spring Lock Washers Kit
The binifiMux Lock Washers Kit includes a comprehensive assortment of 1150 split lock washers in various sizes, ranging from M2 to M12. These washers are designed to enhance the fastening of screws and bolts by providing increased friction. Made from 304 stainless steel, they are resistant to rust and corrosion, ensuring durability over time. If you encounter any defective units, the customer support team is ready to assist you, making your purchase worry-free. This kit is perfect for DIY enthusiasts and professionals alike, ensuring you have the right size for every project.
MewuDecor 1/4" Lock Washers
The MewuDecor Lock Washers are crafted from durable 18-8 (304) stainless steel with a sleek black finish, ensuring excellent resistance to corrosion. These split lock washers feature a unique design with offset split ends, which securely grip the materials they are fastened to, preventing loosening over time. This makes them ideal for a variety of applications, including industrial settings, home projects, and automotive uses. Additionally, they help to distribute the load evenly, enhancing the stability of your fastenings. With a package of 100 washers, you'll have plenty for all your needs.
Vifmy 1000 Pack Spring Lock Washers
The Vifmy Lock Washer Kit offers a comprehensive assortment of 1000 spring lock washers in nine different sizes, making it ideal for various projects. Made from durable 304 stainless steel, these washers resist corrosion and oxidation, ensuring long-lasting performance. Their split design effectively prevents nuts, bolts, and screws from loosening due to vibrations, adding stability to your assemblies. Plus, the washers are neatly organized in a clear case, allowing you to easily access and store them without mixing up sizes, making your DIY or professional tasks more efficient.
Aienxn 420PCS Stainless Steel Lock Washers
The Aienxn Lock Washers Set includes 420 pieces made from durable 304 stainless steel, ensuring long-lasting performance. These washers resist deformation and provide high strength, making them ideal for various applications, from outdoor construction to furniture repair. Their corrosion resistance allows you to use them in challenging environments without worry. With eight different sizes, you can easily find the right fit for your screws, nuts, and bolts, enhancing compatibility and support while preventing damage to materials.
Instockbolts 1/4" Split Lock Washer
Introducing the Instockbolts Split Lock Washer, a high-quality stainless steel spring lock washer designed to provide a secure locking feature when tightened beneath a nut. With its 1/4" dimension, this washer offers a circular bearing surface with offset split ends, allowing it to bite into the mating material effectively. This ensures a tight and secure fit, preventing loosening and enhancing the overall stability of your assembly. With 100pcs included in the package, you can rest assured that you have enough for your project. Plus, the 24h private customer service is available to assist you with any after-sales problems. If you're unsure about the right size for your needs, feel free to reach out for personalized assistance. Upgrade your fastening game with the Instockbolts Split Lock Washer.
Mellewell 3/8" Lock Washers
The Mellewell Lock Washers are designed to enhance the security of your nuts and bolts. With a pack of 50, these split lock washers effectively distribute the load of a fastening, reducing the risk of loosening over time. Made from durable 304 stainless steel, they withstand harsh conditions, including extreme temperatures and humidity, making them ideal for various applications. The black oxide finish offers additional protection, ensuring longevity in daily use. These features make these lock washers a reliable choice for industrial settings, home projects, and automotive needs.
Zxglxinyao 900 PCS Spring Lock Washers
The Zxglxinyao Lock Washers are crafted from high-quality stainless steel, ensuring they resist corrosion and rust, making them ideal for tough environments. The split lock design enhances grip, preventing components from loosening due to vibrations, which is crucial for maintaining secure fastenings. Additionally, the spring lock washers utilize friction to keep bolted joints tight, providing peace of mind during use. With a wide range of sizes included, you’ll find the perfect fit for various applications, whether indoors or outdoors, making these washers versatile and reliable for your projects.
336pcs Washer Assortment Kit by Bnnrjia
The Bnnrjia Washer Kit offers a comprehensive assortment of flat and split lock washers to enhance your fastening projects. The flat washers help distribute pressure from screws and bolts, reducing friction and preventing damage to components. Made from high-quality carbon steel, these washers are designed to resist rust and corrosion, ensuring long-lasting performance. The split lock washers provide added friction to keep nuts and screws securely in place, even under vibration. With a variety of sizes included, you can tackle projects across many applications, from household repairs to automotive work.
Hillman Stainless Steel Split Lock Washer
The Hillman Split Lock Washer is designed to help you achieve a consistent load distribution when using nuts, bolts, or screws of similar sizes. This feature ensures that your fasteners remain secure and stable in various applications. Additionally, these washers are effective at preventing loosening due to vibrations, making them ideal for machinery or automotive use. They also resist corrosion, which enhances their durability and longevity. With these benefits, you can trust that your projects will maintain their integrity over time.
Frequently Asked Questions (FAQs)
1. Are spring lock washers effective?
No, spring lock washers are not effective in preventing loosening. Numerous studies and practical experience have shown that they do not work and can even speed up the rate of loosening in some cases.
2. Where do you put a spring lock washer?
A spring lock washer should be placed on the nut side of the fastener. If an additional washer is needed to spread the load, it should be positioned between the spring washer and the mounting surface.
3. Why would you use a spring washer?
The primary purpose of using a spring washer is to provide tension and preload in a joint assembly. This helps maintain clamping force and prevents loosening or loss of tension caused by factors like vibration, thermal cycling, or other external forces.
4. When should you not use a lock washer?
A lock washer should not be used on soft surfaces like wood or soft plastic, as these materials cannot hold the serrations and may cause the bolt to rotate. It is best to avoid using lock washers in such cases to ensure a secure bolted joint.
5. Do spring washers go on the nut or bolt?
Spring washers, also known as locking washers, are placed on the nut side of the fastener. They are not used on the bolt side like flat washers.
6. What happens if a spring lock gets wet?
If a spring lock washer gets wet, moisture can make it damp and slippery, causing it to move out of place and potentially leading to a failure in its function.
7. What is a disadvantage of split lock washers?
One disadvantage of split lock washers is that their strength is often overrated, increasing the risk of loosening due to embedment. They are only able to withstand clamp forces introduced by fasteners up to a certain strength.
During our spring lock washer research, we found 24 spring lock washer products and shortlisted 10 quality products. We collected and analyzed 5,341 customer reviews through our big data system to write the spring lock washers list. We found that most customers choose spring lock washers with an average price of $6.97.
The spring lock washers are available for purchase. We have researched hundreds of brands and picked the top brands of spring lock washers, including HELIFOUNER, binifiMux, MewuDecor, Vifmy, Aienxn. The seller of top 1 product has received honest feedback from 627 consumers with an average rating of 4.9.

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.