Best Acorn Nuts of 2025

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Acorn nuts, also known as cap nuts, are a type of fastener that are used to cover the ends of bolts and screws. They are typically made of metal and have a domed shape that resembles an acorn. Acorn nuts are commonly used in construction, automotive, and industrial applications to provide a finished look and to prevent injuries from sharp bolt ends. They are available in a variety of sizes and materials to suit different needs. Acorn nuts are a simple and effective way to improve the appearance and safety of any project that involves bolts or screws.
At a Glance: Our Top Picks
Top 10 Acorn Nuts
Belle Vous 140 Pack Acorn Dome Hex Nuts
The Belle Vous Acorn Nuts set includes a variety of sizes, ensuring you have the right nut for your project. Made from durable 304 stainless steel, these nuts resist corrosion and can withstand extreme weather conditions, making them perfect for both indoor and outdoor use. Their domed design protects bolt tips, providing safety and preventing injuries. The convenient storage case keeps everything organised and easy to transport, so you can focus on your tasks without worrying about losing any pieces.
Marine Grade Stainless Steel Acorn Nuts
The Stainless Steel Dome Nuts are crafted from durable Marine Grade A4 stainless steel, ensuring they withstand extreme environments, particularly in saltwater conditions. Their premium A4 steel construction offers exceptional resistance to pitting corrosion, making them ideal for marine and exhaust applications. The acorn style design not only enhances aesthetics but also minimizes the risk of snagging on clothing, ensuring safety during use. Available in various sizes from M3 to M10, these nuts are perfect for both industrial tasks and DIY home improvement projects.
100 PCS Stainless Steel Dome Cap Nuts Set
The DDHOMIN Acorn Nut Kit features high-quality 304 stainless steel construction, ensuring excellent rust resistance that prolongs the life of your screws and bolts. Its hexagonal dome design with deep internal threading makes locking easy and reduces the risk of slipping. The smooth, bright surface of the hex nut caps not only secures your bolts but also adds a decorative touch to any project. With a versatile selection of 100 cap nuts in various sizes, you’ll have the right nut for your machinery, automotive, or DIY needs.
165 Pcs Stainless Steel Dome Cap Nuts Kit
The YITYDaMai Dome Cap Nuts offer a premium solution for your fastening needs. Made from high-strength stainless steel, these nuts provide excellent corrosion resistance, ensuring durability in various environments. Their practical design not only enhances the visual appeal but also protects screw ends from dirt and damage. With an organised storage box, you'll find it easy to keep track of the assorted sizes, making it convenient for you to access the right nut when needed. This set is perfect for both professionals and DIY enthusiasts alike.
M6 Marine Grade A4 Stainless Steel Dome Nuts
The M6 Dome Nuts are crafted from A4 Stainless Steel 316, making them perfect for both indoor and outdoor use in harsh environments. Their exceptional resistance to saltwater corrosion ensures long-lasting strength, particularly in marine applications. Designed in an elegant acorn style, these nuts offer a smooth finish, reducing the risk of snagging on clothing or equipment. With various sizes available, you can easily find the right fit for your specific projects, whether they involve small boat repairs or larger marine ventures.
Stainless Steel Acorn Dome Head Hex Nuts Set
The WeqeYent Acorn Nuts set includes five sizes, ensuring you have the right fit for various tasks. Made from durable 304 stainless steel, these nuts resist rust and corrosion, making them suitable for outdoor use and long-term projects. Their wide application range means you can use them in DIY projects, robotics, and medical equipment, providing you with versatility. The unique design includes an internal hex drive, offering a secure fit and a decorative finish, which enhances the appearance of your work while protecting exposed screw threads.
TERF M10 Dome Cap Hex Nuts - Pack of 10
The TERF M10 Dome Cap Nuts are a convenient choice for your fastening needs. This pack includes 10 dome cap nuts made from zinc plated steel, ensuring durability and resistance to corrosion. The hex dome head type provides a secure grip, making installation easier for you. These nuts are metric, adhering to the DIN1587 specification, so you can trust their compatibility with your projects. Always check the required size before purchasing to ensure a perfect fit.
M3 Solid Brass Acorn Dome Cap Nuts Pack
The M3 Brass Dome Nuts are crafted from durable brass, providing excellent corrosion resistance for both indoor and outdoor applications. With the DIN 1587 standard, these nuts assure precise sizing and robust performance, making them ideal for securing machinery parts or fastening electrical components. Their solid brass construction guarantees reliability and durability, ensuring that your projects are well-supported. The elegant acorn dome cap design also enhances the aesthetic appeal of your furniture and fixtures, making them a versatile choice for various tasks.
Leryati A2 V2A Dome Cap Nuts 25Pcs
The Leryati Dome Cap Nuts are crafted from high-quality stainless steel A2 V2A, offering excellent corrosion and rust resistance. This makes them ideal for both indoor and outdoor use, including damp areas. With various size options available, you can easily choose the right hex cap nuts for your screws or bolts. The threaded design allows for easy installation in tight spaces, giving you the convenience of a quick and efficient setup. Additionally, their protective dome shape helps prevent water and corrosive substances from damaging the exposed threads.
Haosie 70PCS Acorn Dome Cap Nuts
The Haosie Acorn Nuts offer a versatile selection with six different sizes, ensuring you have the right fit for your needs. Their effective protection against rust, dust, and moisture helps keep your bolts in top condition, extending their lifespan. Easy installation means you can quickly secure your components without hassle, saving you time. Additionally, these nuts are widely applicable across various projects, from furniture to mechanical equipment, making them an essential choice for both professionals and hobbyists.
Frequently Asked Questions (FAQs)
1. What is a acorn nut used for?
Acorn Nuts are six sided hexagon nuts, used for tightening bolts and screws. Hex nuts are often found with hex headed bolts. However its use is not limited to only hex headed bolts.
2. Are acorns the same as hazelnuts?
As nouns the difference between acorn and hazelnut is that acorn is the fruit of the oak, being an oval nut growing in a woody cup or cupule while hazelnut is the fruit of the hazel tree.
3. What is inside an acorn nut?
The acorn, or oaknut, is the nut of the oaks and their close relatives (genera Quercus and Lithocarpus, in the family Fagaceae). It usually contains one seed (occasionally two seeds), enclosed in a tough, leathery shell, and borne in a cup-shaped cupule.
4. When were acorn nuts first used?
Developed in the late 1800's, the acorn nut became widely used for applications like windshield brackets. It ensured that no one would get hurt on an exposed end of a threaded bolt. Over the years, closed-end acorn nuts have been used in many applications for consumer safety and to keep the thread damage free.
During our acorn nut research, we found 306 acorn nut products and shortlisted 10 quality products. We collected and analyzed 5,426 customer reviews through our big data system to write the acorn nuts list. We found that most customers choose acorn nuts with an average price of £6.92.
The acorn nuts are available for purchase. We have researched hundreds of brands and picked the top brands of acorn nuts, including BELLE VOUS, DDHOMIN, YITYDaMai, Universal Hardware, WeqeYent. The seller of top 1 product has received honest feedback from 2,541 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.