Best Slotted Nuts of 2025

* We independently evaluate all recommended products and services. If you click on links we provide, we may receive compensation.
Slotted nuts are a type of fastener that feature a slot or cut on one side, allowing for easy installation and removal without the need for specialized tools. These nuts are designed to securely hold objects in place while allowing for quick adjustments or disassembly when necessary. They are commonly used in applications where frequent assembly and disassembly are required, such as in machinery, automotive, or construction industries. Slotted nuts offer convenience and versatility, making them a popular choice for professionals and DIY enthusiasts alike.
At a Glance: Our Top Picks
Top 10 Slotted Nuts
Glarks Metric Barrel Nuts
Glarks Barrel Nuts are high-quality slotted nuts designed for furniture assembly. Made of carbon steel, these nuts are strong and durable, ensuring a secure fit when used with connector bolts. The kit includes 75 pieces in five different sizes, allowing for versatility in matching screw bolts. These nuts are specifically designed for M6 crib bolts and are not suitable for M8 bolts. They are commonly used in the assembly of beds, cots, and flat pack furniture, as well as for joining wood and boards. With Glarks Barrel Nuts, you can easily and securely assemble your furniture, providing stability and durability for your home.
Abeicy 1/4"-20 Threaded Barrel Nuts
The Abeicy Barrel Nuts are designed for a secure and stable connection in various furniture applications. Before purchasing, ensure you check the size to avoid any costly returns. These barrel nuts are sturdy enough to prevent any flexing or wobbling in your joints, ensuring a tight fit. They are versatile and suitable for assembling beds, cots, and office furniture, as well as for joining wood and worktops. Installation is straightforward, thanks to the clear screw thread and the compatibility with connector bolts, making your assembly tasks much easier.
uxcell M52 Carbon Steel Round Nut
The uxcell M52 Round Nut features a robust carbon steel construction with an oxidized black finish, providing excellent corrosion resistance and strength. Its four slotted grooves enhance usability, allowing you to easily attach or detach the nut with common tools like wrenches. With a thread specification of M52 x 1.5mm and a thickness of 12mm, this nut is designed for precision manufacturing applications, such as rolling and sliding bearings. You can confidently use it in various industries, knowing it will maintain a secure connection during frequent adjustments.
maierke M6 Barrel Bolts Cross Dowel Slotted Nuts
Introducing the maierke Slotted Nuts, a must-have for all your furniture assembly needs. Made from high-strength carbon steel, these slotted nuts are not only firm and durable but also provide a secure connection for your beds or chairs. With a metric M6 size and a 6mm hole, these nuts are versatile and can be used with connecting bolts to fix most beds and flat-pack furniture cabinets and wardrobes. They are also perfect for connecting wood, boards, and kitchen countertops. The maierke Slotted Nuts kit comes with 72 pieces, including 5 different sizes to ensure compatibility with various furniture pieces. Say goodbye to loose furniture and hello to a sturdy and reliable assembly with the maierke Slotted Nuts.
5/8" Slotted Hex Nuts by BoltsandNuts.com
The Slotted Hex Nuts by BoltsandNuts.com come in a set of 20, making them a practical choice for various projects. With a diameter and pitch of 5/8"-11, these nuts are designed for Grade 2 applications, providing durability and strength. The zinc clear finish ensures resistance to corrosion, which is essential for outdoor or high-moisture conditions. Additionally, the coarse threads allow for easier installation, so you can save time and effort. Finally, the 15/16" wrench size offers compatibility with standard tools, making it convenient for users to find the right fit.
SUUJI 10 PCS Metric M6 Barrel Nuts
The SUUJI Metric M6 Barrel Nuts are strong and durable hardware replacement kit for various furniture assemblies. Made of carbon steel and galvanized to prevent oxidation, these barrel nuts are designed to maximize product life. With a thread hole diameter of 5.35mm, thread pitch of 1mm, outer diameter of 10mm, and length of 12mm, they are suitable for most beds, cribs, and flat furniture. These barrel nuts work well in joining wood and boards, making them ideal for kitchen cupboards and other furniture pieces. Please carefully read the size details before placing an order to ensure a perfect fit for your needs.
Abeicy 20 Packs Threaded Barrel Nuts
The Abeicy Barrel Nuts are designed for easy assembly of various furniture pieces, including beds, cots, and cabinets. Before purchasing, you should verify the size to avoid any costly returns. These barrel nuts provide a strong and stable connection, ensuring that joints remain tight and secure, preventing any wobbling or flexing. Made from high-hardened galvanized iron, they promise durability and a long lifespan, making them a reliable choice for your furniture needs. With a versatile application range, these nuts are perfect for both woodworking and flat-pack furniture assembly.
FMHXG M6 Cross Dowels
The FMHXG Barrel Nuts are made from durable carbon steel, ensuring high strength and resistance to oxidation and corrosion. This means you can rely on them for long-lasting performance in your furniture projects. With dimensions of 13 x 10 mm, these barrel nuts are specifically designed for use with metric M6 bolts, providing a snug fit for secure assembly. Each package contains 20 slotted nuts, making it convenient for various applications, from beds to office furniture. Their non-toxic, mercury-free composition ensures safety, allowing you to focus on building without worrying about harmful materials.
NACX M8 Slotted Barrel Nuts
The NACX Slotted Barrel Nuts are designed for versatility and strength. With a diameter of 8mm and a length of 15mm, these nuts are perfect for securing furniture like tables, chairs, and cabinets. The zinc plating not only gives them a bright appearance but also ensures resistance to corrosion, making them suitable for damp environments. The deep threads and sharp screw teeth help prevent slipping during installation, giving you confidence in the durability of your projects. This set comes with 30 pieces, providing great value for your assembly needs.
Hard-to-Find Fastener Coarse Slotted Hex Nuts
The Hard-to-Find Fastener Slotted Nuts are designed with a 1/2-inch diameter, making them ideal for various fastening applications. Made from durable steel and finished with a protective zinc coating, these nuts resist rust and wear, ensuring longevity. The coarse thread type (13) provides a secure grip, allowing you to easily tighten or loosen them without hassle. Their slotted design adds versatility, as you can use a flathead screwdriver for installation or removal, enhancing your convenience during projects.
Frequently Asked Questions (FAQs)
1. What are slotted nuts used for?
Slotted nuts are used in applications where there is a risk of vibration or motion that could loosen the nut. They provide a locking mechanism to prevent the nut from coming undone. Slotted nuts are similar to castle nuts and can often be used interchangeably due to their similar dimensions.
2. What is the difference between slotted and castle nuts?
The main difference between slotted and castle nuts is in the design of the turret end section where the split pin is inserted. A castle nut has a slightly turned-down end section that allows the split pin to be wound around and pinned against the turret, keeping the pin from protruding. On the other hand, a slotted nut does not have this feature.
3. What is a slotted hex nut designed to be used with?
A slotted hex nut is designed to be used with a cotter pin to create a locking mechanism. These nuts have portions cut out, similar to a castle nut, but with a lower profile. This makes them a suitable option for certain applications.
4. What keeps a slotted nut from coming off?
To prevent a slotted nut from coming off, a cotter pin is used. After the nut is tightened, the cotter pin is inserted into the nut slot and the bolt tail hole. The end of the cotter pin is then pulled open to secure it, preventing the relative rotation of the nut and the bolt.
5. What is the purpose of a double nut?
The purpose of using two nuts, known as a double nut, is to prevent self-loosening of fasteners. This method is commonly used in old machinery. The thin nut, often placed below the standard thickness nut, adds an extra layer of security to prevent loosening.
6. Why do people stake castle nuts?
Staking castle nuts is done to ensure the nut remains securely in place. Failure to stake the castle nut can lead to issues, especially in critical situations. For firearms, staking the castle nut is crucial to prevent it from coming loose during use, which could have catastrophic consequences.
During our slotted nut research, we found 19 slotted nut products and shortlisted 10 quality products. We collected and analyzed 4,034 customer reviews through our big data system to write the slotted nuts list. We found that most customers choose slotted nuts with an average price of $7.91.
The slotted nuts are available for purchase. We have researched hundreds of brands and picked the top brands of slotted nuts, including Glarks, Abeicy, uxcell, maierke, BoltsandNuts.com. The seller of top 1 product has received honest feedback from 1,113 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.