Best Slotted Nuts of 2025

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Slotted nuts are a type of fastener commonly used in construction, engineering, and manufacturing. They are designed to be tightened or loosened with the use of a screwdriver or other flat-bladed tool, which is inserted into the slot on the top of the nut. Slotted nuts are particularly useful in applications where a high degree of torque is required, as they provide a secure and stable connection between two components. They are available in a range of sizes and materials to suit different requirements and are a reliable and cost-effective solution for a variety of industrial and mechanical applications.
At a Glance: Our Top Picks
Top 10 Slotted Nuts
sourcing map M12x1.25mm Hexagon Slotted Nut Set
The sourcing map Hexagon Slotted Nuts are designed with an M12 thread size and a 1.25mm pitch, offering a secure fit for various applications. With a width of 19mm and a height of 14mm, these nuts are made from durable carbon steel, ensuring they resist rust and wear. The slotted design allows for easy insertion of a cotter pin, which enhances security when used with drilled shank fasteners. Ideal for securing front wheel bearings and hubs, these nuts cater to both industrial and household repair needs.
SZXMDKH M6 Barrel Nuts for Furniture
The SZXMDKH Barrel Nuts are designed for ease of use in furniture assembly. With a total length of 12 mm and an outer diameter of 10 mm, these nuts are perfectly sized for your needs. Made from high-quality carbon steel, they offer excellent durability and resistance to rust and corrosion, ensuring a long lifespan. Their compact size makes them convenient to store, and they work seamlessly with connector bolts to create strong right angle joints, ideal for assembling beds, cots, and flat-pack furniture.
sourcing map M22x1.5mm Hex Slotted Nut Set
The sourcing map Hex Slotted Nuts are designed with a thread size of M22 and a pitch of 1.5mm, making them ideal for various fastening applications. With a width of 32mm and a height of 24mm, these nuts provide a robust solution for securing components. Made from high-quality carbon steel, they are resistant to rust and wear, ensuring durability over time. The slotted design allows for easy insertion of a cotter pin, enhancing security when used with drilled shank fasteners.
sourcing map M8 Stainless Steel Hex Nuts
The sourcing map Hex Nuts are crafted from high-quality 304 stainless steel, ensuring durability and resistance to rust and wear. With a 1.25mm pitch and a width of 13mm, they provide a secure fastening solution for various applications. The flat head design enhances the fastening effect, while the deep threads ensure even force distribution during use. Additionally, the slots allow for the insertion of a cotter pin, offering extra security when attached to a drilled shank fastener, making them ideal for both industrial and household tasks.
sourcing map M24x3mm Hexagon Slotted Nut
The sourcing map Hexagon Nut features a threaded design with a size of M24 and a 3mm pitch, providing a reliable fit for various applications. With a width of 1.42 inches and a height of 1.16 inches, this nut is made from durable carbon steel and has a colour zinc finish, ensuring resistance to rust and wear. The slots allow for easy insertion of a cotter pin, securing the nut effectively during operation. This product is ideal for industry use, particularly for securing front wheel bearings on trucks.
sourcing map Hexagon Slotted Nut Set
The sourcing map Hex Nut is designed with an M12 thread size and a pitch of 1.75mm, making it versatile for various applications. Its robust carbon steel construction ensures high hardness and resistance to rust, providing durability and longevity. The slots allow for easy insertion of a cotter pin, which helps secure the nut with drilled shank fasteners. With its colour zinc finish, this nut is not only functional but also resistant to wear and corrosion, making it a reliable choice for mechanical repairs and maintenance tasks.
sourcing map M20 Hexagon Slotted Nut, 2Pcs
The sourcing map Hexagon Nut features a threaded size of M20 with a pitch of 1.5mm, making it suitable for various industrial applications. Its dimensions of 30mm width and 22mm height ensure a secure fit. Made from high-quality carbon steel, this nut boasts a blackened surface finish that resists rust and wear, providing durability and longevity. The slots allow for the insertion of a cotter pin, ensuring that the nut remains securely fastened, which is particularly useful in securing front wheel bearings and hubs.
Sourcingmap 5pcs M12 Carbon Steel Castle Nut
The Sourcingmap M12 Castle Nut is designed for durability and reliability. Made from medium carbon steel, this product ensures strength and longevity in various applications. Weighing just 75 grams, it is lightweight yet robust, making it easy for you to handle during installation. With dimensions of 18.5 x 18.5 x 13mm, it fits seamlessly into your projects. Its black oxide finish not only enhances its aesthetic appeal but also offers added protection against corrosion, ensuring it remains in good condition over time.
sourcing map M12 Stainless Steel Hex Nuts
The sourcing map Hex Nuts are crafted from durable 304 stainless steel, ensuring high hardness and resistance to rust and wear. With a pitch of 1.75mm and a width of 18mm, these nuts provide a reliable fastening solution, ideal for various applications. The deep thread design allows for even force distribution, making it easier for you to secure components without slipping. Additionally, the slots enable the insertion of a cotter pin, providing an extra layer of security when used with drilled shank fasteners.
Uxcell M25 Four-Slot Round Nut Set
The Uxcell Four-Slot Nut features an M25 x 1.5mm thread specification and an outer diameter of 39mm, making it suitable for various applications. Made from carbon steel with a black oxidised finish, it offers excellent corrosion resistance and high strength, ensuring reliable connections. The nut's four slotted grooves enhance usability, allowing you to easily load and unload it with a wrench or other tools. These nuts are ideal for precision manufacturing equipment and are commonly used in industries like automotive and aerospace.
Frequently Asked Questions (FAQs)
1. What are slotted nuts used for?
Slotted nuts are used in applications where vibration or motion might undo the locknut. Both a castle nut and slotted nut look similar, and can often be used interchangeably because they have almost identical dimensions.
2. What is the difference between a castle nut and a slotted nut?
Castle Nuts The difference between a slotted nut and a castle nut is the latter has turret geometry on the top of the nut. The nut thicknesses are the same as a slotted nut. Like slotted nuts, castle nut applications are similar using steel pins and taper or split pins, to lock the nut into position after tightening.
3. What is a slotted hex nut?
Slotted Hex Nuts are hex nuts with slots protruding from the top, similar to castle nuts. To use a slotted nut, a hole is drilled through the threaded portion of a bolt or stud. ... The cotter pin locks the slotted nut into place, which eliminates the need for other locking-type fasteners.
4. What is a castle nut Why is it called castle nut?
A castellated nut, sometimes referred to as a castle nut, is a nut with slots (notches) cut into one end. The name comes from the nut's resemblance to the crenellated parapet of a medieval castle. Castellated nuts are sometimes referred to incorrectly as castigated nuts.
During our slotted nut research, we found 43 slotted nut products and shortlisted 10 quality products. We collected and analyzed 3,409 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 £8.67.
The slotted nuts are available for purchase. We have researched hundreds of brands and picked the top brands of slotted nuts, including sourcing map, SZXMDKH, Uxcell. The seller of top 1 product has received honest feedback from 20,002 consumers with an average rating of 4.8.

Corey Philips is an electrician and lighting expert. He graduated from the University of Birmingham in 2012 with a Bachelor's degree in electrical and electronics engineering. Corey is a specialist contractor in lights. He sells and installs and recommends lights and lamp sheds, and other lights accessories. Aside from that, Corey is vast in installing and maintaining electrical appliances like air conditioners, water heaters, and the likes.