Best Acorn Nuts of 2025

Corey Phillips Avatar
Corey Phillips
Last Updated: 1 Feb 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

Belle Vous 140 Pack Acorn Dome Hex Nuts Cover #TOP 1
Belle Vous 140 Pack Acorn Dome Hex Nuts
ftb score rating icon 9.8
Marine Grade Stainless Steel Acorn Nuts Cover #TOP 2
Marine Grade Stainless Steel Acorn Nuts
ftb score rating icon 9.7
100 PCS Stainless Steel Dome Cap Nuts Set Cover #TOP 3
100 PCS Stainless Steel Dome Cap Nuts Set
ftb score rating icon 9.5

Top 10 Acorn Nuts

#TOP 1

Belle Vous 140 Pack Acorn Dome Hex Nuts

BVOUS-NAB3
Silver
Belle Vous 140 Pack Acorn Dome Hex Nuts Cover
Belle Vous 140 Pack Stainless Steel Acorn Dome Cap Hex Nuts - M3, M4, M5, M6, M8, M10 & M12 - Acorn Dome Head Nut Assortment Kit with Storage Case for Protection, Indoor & Outdoor Use

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.

What We Like
Diverse sizes included
Corrosion-resistant material
Safe domed design
Organised storage case
Suitable for various projects
#TOP 2

Marine Grade Stainless Steel Acorn Nuts

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Stainless Steel
Marine Grade Stainless Steel Acorn Nuts Cover
Stainless Steel Cap Nuts Hex Acorn Dome Head M3 M4 M5 M6 M8 M10 Marine Grade Nut for Screws Bolts Fasteners, Rust-Resistant Hardware, DIY Home Improvement Outdoor Projects - Pack of 6 (M4)

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.

What We Like
Highly corrosion resistant
Safe acorn style design
Available in various sizes
Durable for extreme environments
Ideal for DIY projects
#TOP 3

100 PCS Stainless Steel Dome Cap Nuts Set

0100
Silver
100 PCS Stainless Steel Dome Cap Nuts Set Cover
100 PCS Stainless Steel Dome Cap Nuts, Hex Acorn Nut Kit, M3 M4 M5 M6 M8 Assorted Sizes

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.

What We Like
High-quality stainless steel
Easy to lock and secure
Aesthetically pleasing design
Versatile size selection
Suitable for various applications
#TOP 4

165 Pcs Stainless Steel Dome Cap Nuts Kit

165 Pcs Stainless Steel Dome Cap Nuts Kit Cover
165 Pcs Dome Cap Nuts, Stainless Steel Acorn Dome Cap Nuts, Acorn Thread Hex Cap Head Nuts Assortment Kit, Acorn Decorative Hex Cap Nuts - M3/M4/M5/M6/M8/M10/M12. (silver/stainless steel)

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.

What We Like
High-strength stainless steel
Corrosion-resistant
Visual enhancement
Organised storage box
Wide application use
#TOP 5

M6 Marine Grade A4 Stainless Steel Dome Nuts

StainlessSteelNuts
M6 Marine Grade A4 Stainless Steel Dome Nuts Cover
M6 Dome Nuts Marine Grade Acorn Style in A4 Stainless Steel 316 – Corrosion Resistant Fasteners (Pack of 20)

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.

What We Like
Corrosion resistant for durability
Elegant acorn style design
Suitable for harsh environments
Available in various sizes
#TOP 6

Stainless Steel Acorn Dome Head Hex Nuts Set

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Silver
Stainless Steel Acorn Dome Head Hex Nuts Set Cover
100 Pcs Stainless Steel Acorn Dome Head Hex Nuts,Head Cap Nut M8 M6 M5 M4 M3 Dome Hex Cap Nuts,Hexagon Acorn Nuts, Nuts Assortment Kit,Round Fastening Domed Cap(Silver)

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.

What We Like
Five size options included
Durable stainless steel material
Versatile for various applications
Secure internal hex design
Attractive decorative finish
#TOP 7

TERF M10 Dome Cap Hex Nuts - Pack of 10

TERF - Dome Cap Nut
TERF M10 Dome Cap Hex Nuts - Pack of 10 Cover
TERF® M10 Dome Cap Nuts M10 (10mm) Steel Dome Cap Hex Nut Head Acorn Nuts Cover - 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.

What We Like
Durable zinc plated steel
Easy installation with hex head
Metric size for compatibility
Pack of 10 for convenience
#TOP 8

M3 Solid Brass Acorn Dome Cap Nuts Pack

Brassnutswashers
brass
M3 Solid Brass Acorn Dome Cap Nuts Pack Cover
M3 Solid Brass Acorn Dome Cap Nuts DIN1587(Pack of 10)

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.

What We Like
Corrosion-resistant material
Meets DIN 1587 standards
Reliable and durable
Suitable for various applications
Elegant design
#TOP 9

Leryati A2 V2A Dome Cap Nuts 25Pcs

Leryati A2 V2A Dome Cap Nuts 25Pcs Cover
M4 Nut Caps 25Pcs, Leryati Dome Cap Nuts A2 V2A Metric Acorn Thread Hex Cap, Stainless Steel Cap Nuts DIN1587 Hex Cap Nuts Domed Head Top Hex Nuts Suitable for Screws and Bolts

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.

What We Like
Durable stainless steel construction
Easy installation in tight spaces
Corrosion and rust resistant
Versatile for various applications
Protective dome shape
#TOP 10

Haosie 70PCS Acorn Dome Cap Nuts

Haosie
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Black
Haosie 70PCS Acorn Dome Cap Nuts Cover
Haosie 70PCS Dome Nut, Acorn Dome Cap Nut, Hex Caps Nut, M3/M4/M5/M6/M8/M10, for Protecting Hex Screws Bolts (Black)

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.

What We Like
Multiple sizes available
Protects against rust
Simple installation
Versatile applications
Buying Guide Image

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.

Editor's Notes

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.

Written by
Corey Phillips Avatar

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.