Looking for the best split lock washers to keep your projects secure? We’ve tested and reviewed the top 10 picks to help you find the perfect fit for stronger and safer results.
Split lock washers are essential for any project. They keep bolts and screws tight, preventing loosening over time. These small parts make a big difference in your work.
Made from stainless steel, they resist rust and last long. Perfect for indoor and outdoor use, they handle harsh conditions with ease. You’ll find them reliable for any task.
We’ve tested and reviewed the best split lock washers for you. Discover the top picks to make your projects stronger and safer. Let’s find the perfect fit for your needs!
List of Top 10 Split Lock Washers
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1000 Pcs Spring Lock Washers Assortment Kit – 9 SAE Sizes Split Lock Washers, 304 Stainless Steel Washers for Screws and Bolts (#4, #6, #8, #10, #12, 1/4″, 5/16″, 3/8″, 1/2″) |
This 1000 Pcs Spring Lock Washers Assortment Kit is perfect for anyone who needs reliable fasteners for indoor or outdoor projects. Whether you’re a DIY enthusiast, professional mechanic, or home repair expert, these 304 stainless steel washers ensure strong, rust-resistant connections in any environment. |
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Zxglxinyao 900 PCS Stainless Steel Spring Lock Washer, Split Lock Washer, Split Ring Washer Bolt Screw Spring Washer, 2#, 1/8″, 5/32″, 3/16″, 1/4″, 5/16″, 3/8″, 1/2″ |
Zxglxinyao 900 PCS Stainless Steel Spring Lock Washer is perfect for anyone who needs reliable, durable fasteners for indoor or outdoor projects. Whether you’re working on home repairs, machinery, or DIY tasks, these corrosion-resistant washers ensure secure connections in harsh conditions or high-vibration environments. |
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Sieqioor 376Pcs Spring Lock Washer Assortment Kit, 4# 6# 8# 10# 12# 1/4″ 5/16″ 3/8″ 1/2″ 9/16″ 5/8″ 3/4″ SAE Split Lock Washer Set, 304 Stainless Steel Lock Washers & Flat Washers for Screws Bolts |
This 376-piece spring lock washer kit is perfect for DIY enthusiasts, mechanics, and professionals who need reliable, rust-resistant fasteners for indoor and outdoor projects. Whether you’re fixing furniture, working on cars, or building machinery, these 304 stainless steel washers ensure long-lasting stability and easy organization with their clear storage case. |
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Instockbolt 1/4″ Split Lock Washer, 18-8 (304) Stainless Steel Spring Lock Washer 150PCS |
This Instockbolt 1/4″ Split Lock Washer is perfect for anyone needing strong, reliable fasteners. Whether you’re a DIY enthusiast or a professional, these stainless steel washers ensure a secure lock for your projects. |
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Vifmy Spring Lock Washers Assortment Kit(1000 Pack), M2 M2.5 M3 M4 M5 M6 M8 M10 M12 Metric Split Lock Washer Set,304 Stainless Steel Lock Washers for Screws Bolts |
This Vifmy Spring Lock Washers Assortment Kit is perfect for DIY enthusiasts, builders, and professionals who need a reliable and durable solution for securing screws, bolts, and nuts. Whether you’re working on furniture repairs, outdoor construction, or electrical maintenance, this kit has you covered with 9 sizes and 1000 pieces of 304 stainless steel lock washers that prevent loosening and ensure stability. |
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Vifmy Metric & SAE Spring Lock Washers Assortment Kit(1780Pcs), M2 M2.5 M3 M4 M5 M6 M8 M10 M12#4#6#8#10#12 1/4″ 5/16″ 3/8″ 1/2″ Metric SAE Split Lock Washer Set, 304 Stainless Steel Lock Washer |
This 1780-piece spring lock washer kit is perfect for anyone who needs a reliable and organized set of washers for various projects. Whether you’re a DIY enthusiast, a professional builder, or someone who works with furniture, outdoor construction, or electrical maintenance, this kit has you covered with 18 different sizes in a convenient storage case. |
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Sieqioor 158Pcs Spring Lock Washer Assortment Kit, 6# 8# 10# 1/4″ 5/16″ 3/8″ 7/16″ 1/2″ 5/8″ SAE Split Lock Washer Set, Black 304 Stainless Steel Lock Washers & Flat Washers for Screws Bolts |
This spring lock washer kit is perfect for DIY enthusiasts, mechanics, and construction workers who need durable, rust-resistant washers for machinery repair, furniture projects, and outdoor installations. The 304 stainless steel and clear storage case make it ideal for anyone who values long-term reliability and easy organization. |
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binifiMux 1150pcs M2 M2.5 M3 M4 M5 M6 M8 M10 M12 Spring Lock Washers Assortment Kit, 304 Stainless Steel |
This binifiMux Spring Lock Washers Assortment Kit is perfect for anyone who needs a reliable, rust-free solution for fastening screws and bolts. Whether you’re a DIY enthusiast, a professional mechanic, or just someone who likes to keep things secure and tight, this kit has you covered with its anti-rust, corrosion-resistant design. |
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3/8 Split Lock Washer (100 Pack) Zinc Plated Steel, Meets ASME B18.21.1 by Makers Bolt |
These 3/8 Split Lock Washers are perfect for anyone who needs reliable fasteners for general projects. Whether you’re a DIY enthusiast or a professional, these zinc-plated steel washers offer moderate corrosion resistance and prevent loosening, making them ideal for everyday use. |
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M6 Split Lock Washer, 18-8 (304) Stainless Steel Spring Lock Washer Elastic Gasket 100PCS |
The M6 Split Lock Washer is perfect for anyone needing reliable, rust-resistant fasteners. Ideal for DIY projects, repairs, or professional use, these stainless steel washers ensure secure connections every time. |
Detailed Reviews
Discover the top 10 split lock washers rated for strength and reliability—each chosen for 304 stainless steel durability and split lock design that prevents loosening. From 1000-piece kits to metric and SAE assortments, these washers tackle projects indoors and outdoors with ease. Explore the best splits for screws, bolts, and nuts—your next job needs the perfect fit.
1. 1000 Pcs Spring Lock Washers Assortment Kit – 9 SAE Sizes Split Lock Washers, 304 Stainless Steel Washers for Screws and Bolts (#4, #6, #8, #10, #12, 1/4″, 5/16″, 3/8″, 1/2″)

This 1000-piece kit includes 9 SAE sizes of spring lock washers. It’s perfect for daily and professional use. The set covers all your fastening needs.
Made from 304 stainless steel, these washers resist rust and last long. They work well in wet or harsh conditions. Ideal for indoor and outdoor projects.
The kit comes in a clear, labeled storage box. It keeps washers organized and easy to find. No more lost or mixed-up pieces!
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Perfect For:
This 1000 Pcs Spring Lock Washers Assortment Kit is perfect for anyone who needs reliable fasteners for indoor or outdoor projects. Whether you’re a DIY enthusiast, professional mechanic, or home repair expert, these 304 stainless steel washers ensure strong, rust-resistant connections in any environment.
Ready to Purchase?
2. Zxglxinyao 900 PCS Stainless Steel Spring Lock Washer, Split Lock Washer, Split Ring Washer Bolt Screw Spring Washer, 2#, 1/8″, 5/32″, 3/16″, 1/4″, 5/16″, 3/8″, 1/2″

The Zxglxinyao 900 PCS Stainless Steel Spring Lock Washer set is a must-have for any project. Made from high-quality stainless steel, these washers are rust-resistant and durable. They work well in harsh environments and last a long time.
These split lock washers prevent bolts from loosening due to vibration. Their unique design creates friction, keeping parts secure. Perfect for indoor and outdoor use.
With 900 pieces in 9 sizes, this set meets all your needs. From small to large projects, you’ll have the right washer every time. A reliable choice for any task.
| Pros | Cons |
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Perfect For:
Zxglxinyao 900 PCS Stainless Steel Spring Lock Washer is perfect for anyone who needs reliable, durable fasteners for indoor or outdoor projects. Whether you’re working on home repairs, machinery, or DIY tasks, these corrosion-resistant washers ensure secure connections in harsh conditions or high-vibration environments.
Ready to Purchase?
3. Sieqioor 376Pcs Spring Lock Washer Assortment Kit, 4# 6# 8# 10# 12# 1/4″ 5/16″ 3/8″ 1/2″ 9/16″ 5/8″ 3/4″ SAE Split Lock Washer Set, 304 Stainless Steel Lock Washers & Flat Washers for Screws Bolts

The Sieqioor 376Pcs Spring Lock Washer Assortment Kit is a must-have for any project. It includes 12 sizes of SAE spring lock washers, perfect for all needs. From small DIY tasks to big construction jobs, it’s got you covered.
Made from 304 stainless steel, these washers resist rust and corrosion. They work great indoors and outdoors, lasting longer than cheaper options.
The split lock design keeps nuts, bolts, and screws tight. It’s ideal for machinery, repairs, and automotive work. Plus, the clear storage case keeps everything organized and easy to find.
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Perfect For:
This 376-piece spring lock washer kit is perfect for DIY enthusiasts, mechanics, and professionals who need reliable, rust-resistant fasteners for indoor and outdoor projects. Whether you’re fixing furniture, working on cars, or building machinery, these 304 stainless steel washers ensure long-lasting stability and easy organization with their clear storage case.
Ready to Purchase?
4. Instockbolt 1/4″ Split Lock Washer, 18-8 (304) Stainless Steel Spring Lock Washer 150PCS

The Instockbolt 1/4″ Split Lock Washer is a must-have for any project. Made from high-quality stainless steel, it ensures durability and strength. Each pack includes 150 pieces, so you’ll always have enough.
This washer has a circular bearing surface with offset split ends. These ends bite into the material, providing a secure lock when tightened. It’s perfect for preventing loosening under a nut.
With 24-hour customer service, you’re always supported. If you’re unsure about the right size, just reach out for help. Rest assured, this product is reliable and easy to use.
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Perfect For:
This Instockbolt 1/4″ Split Lock Washer is perfect for anyone needing strong, reliable fasteners. Whether you’re a DIY enthusiast or a professional, these stainless steel washers ensure a secure lock for your projects.
Ready to Purchase?
5. Vifmy Spring Lock Washers Assortment Kit(1000 Pack), M2 M2.5 M3 M4 M5 M6 M8 M10 M12 Metric Split Lock Washer Set,304 Stainless Steel Lock Washers for Screws Bolts

The Vifmy Spring Lock Washers Assortment Kit comes with 1000 pieces in 9 sizes, from M2 to M12. Each size is packed separately in a clear case for easy storage. This kit helps you tackle projects from DIY furniture to construction.
Made of 304 stainless steel, these washers are strong and rust-resistant. They last longer than galvanized materials, making them perfect for outdoor use. Their split design prevents nuts and bolts from loosening over time.
Use these washers with screws, nuts, and bolts for stable connections. They’re great for furniture repair, electrical work, and more. The clear case keeps everything organized and ready to use.
| Pros | Cons |
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Perfect For:
This Vifmy Spring Lock Washers Assortment Kit is perfect for DIY enthusiasts, builders, and professionals who need a reliable and durable solution for securing screws, bolts, and nuts. Whether you’re working on furniture repairs, outdoor construction, or electrical maintenance, this kit has you covered with 9 sizes and 1000 pieces of 304 stainless steel lock washers that prevent loosening and ensure stability.
Ready to Purchase?
6. Vifmy Metric & SAE Spring Lock Washers Assortment Kit(1780Pcs), M2 M2.5 M3 M4 M5 M6 M8 M10 M12#4#6#8#10#12 1/4″ 5/16″ 3/8″ 1/2″ Metric SAE Split Lock Washer Set, 304 Stainless Steel Lock Washer

The Vifmy Spring Lock Washers Kit includes 1,780 pieces in 18 sizes. It covers both metric and SAE measurements. Perfect for DIY projects and construction work.
Made from 304 stainless steel, these washers resist rust and corrosion. They last longer than galvanized materials. Ideal for outdoor use and long-term stability.
Each size is stored in a clear case for easy access. Use them with screws, nuts, and bolts. Great for furniture repair and electrical maintenance.
| Pros | Cons |
|---|---|
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Perfect For:
This 1780-piece spring lock washer kit is perfect for anyone who needs a reliable and organized set of washers for various projects. Whether you’re a DIY enthusiast, a professional builder, or someone who works with furniture, outdoor construction, or electrical maintenance, this kit has you covered with 18 different sizes in a convenient storage case.
Ready to Purchase?
7. Sieqioor 158Pcs Spring Lock Washer Assortment Kit, 6# 8# 10# 1/4″ 5/16″ 3/8″ 7/16″ 1/2″ 5/8″ SAE Split Lock Washer Set, Black 304 Stainless Steel Lock Washers & Flat Washers for Screws Bolts

The Sieqioor 158Pcs Spring Lock Washer Assortment Kit is a must-have for any project. It includes 9 sizes of SAE spring lock washers, perfect for all needs. From small DIY tasks to big builds, it’s got you covered.
Made from 304 stainless steel, these washers resist rust and corrosion. They work great indoors and outdoors, lasting longer than cheaper options.
The clear storage case keeps washers organized and easy to find. No more lost pieces or mixing sizes. It’s convenient and reliable for every job.
| Pros | Cons |
|---|---|
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Perfect For:
This spring lock washer kit is perfect for DIY enthusiasts, mechanics, and construction workers who need durable, rust-resistant washers for machinery repair, furniture projects, and outdoor installations. The 304 stainless steel and clear storage case make it ideal for anyone who values long-term reliability and easy organization.
Ready to Purchase?
8. binifiMux 1150pcs M2 M2.5 M3 M4 M5 M6 M8 M10 M12 Spring Lock Washers Assortment Kit, 304 Stainless Steel

The binifiMux 1150pcs Spring Lock Washers Assortment Kit is a must-have for any project. It includes 9 sizes from M2 to M12, covering all your needs.
Made of 304 stainless steel, these washers are anti-rust and corrosion-resistant. They offer strong strength for reliable fastening.
Use them with flat washers to secure screws and bolts better. If you get defective units, contact the team for help.
| Pros | Cons |
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Perfect For:
This binifiMux Spring Lock Washers Assortment Kit is perfect for anyone who needs a reliable, rust-free solution for fastening screws and bolts. Whether you’re a DIY enthusiast, a professional mechanic, or just someone who likes to keep things secure and tight, this kit has you covered with its anti-rust, corrosion-resistant design.
Ready to Purchase?
9. 3/8 Split Lock Washer (100 Pack) Zinc Plated Steel, Meets ASME B18.21.1 by Makers Bolt

The 3/8 Split Lock Washer is a must-have for any project. It comes in a 100-pack, so you’ll have plenty on hand. Each washer is zinc plated for extra protection.
These washers are ASME B18.21.1 certified, ensuring quality and reliability. They are made of low carbon steel, perfect for general use. The split design helps prevent nuts from loosening.
With a 3/8″ size, these washers fit many bolts. They are easy to use and long-lasting. Get yours today for secure fastening!
| Pros | Cons |
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Perfect For:
These 3/8 Split Lock Washers are perfect for anyone who needs reliable fasteners for general projects. Whether you’re a DIY enthusiast or a professional, these zinc-plated steel washers offer moderate corrosion resistance and prevent loosening, making them ideal for everyday use.
Ready to Purchase?
10. M6 Split Lock Washer, 18-8 (304) Stainless Steel Spring Lock Washer Elastic Gasket 100PCS

The M6 Split Lock Washer helps keep bolts tight. It is made of 304 stainless steel for strong use.
This pack gives you 100 pieces in a silver finish. It is small, light, and easy to use.
It fits 6.0 mm parts. It helps stop loosening. It adds a firm hold.
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Perfect For:
The M6 Split Lock Washer is perfect for anyone needing reliable, rust-resistant fasteners. Ideal for DIY projects, repairs, or professional use, these stainless steel washers ensure secure connections every time.
Ready to Purchase?
Buying Guide
Split lock washers are small but mighty parts that keep bolts and screws tight. They prevent loosening over time, making your projects stronger and safer. Choosing the right ones can make a big difference in your work.
Factors to Consider When Buying Split Lock Washers:
- Material: Look for 304 stainless steel for rust resistance and durability. It’s perfect for indoor and outdoor use.
- Size: Check the bolt or screw size to match the washer. Kits with multiple sizes save time and money.
- Quantity: Buy in bulk for big projects or smaller packs for occasional use. Kits with 100 to 1000 pieces are common.
- Storage: Choose kits with clear, labeled cases to keep washers organized and easy to find.
- Design: Split lock washers with offset split ends provide a secure grip, preventing loosening.
- Certification: For quality assurance, pick washers that meet ASME B18.21.1 standards.
- Price: Compare prices for the best value. Stainless steel options are pricier but last longer.