Best Flange Bolts of 2025

Corey Phillips Avatar
Corey Phillips
Last Updated: 1 Feb 2025

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Flange bolts are a type of fastener commonly used in construction, automotive, and industrial applications. These bolts have a wide, flat flange at the base that distributes the clamping force over a larger area, providing a more secure and stable joint. Flange bolts are available in various sizes, materials, and finishes to suit different requirements. They are known for their high tensile strength, corrosion resistance, and durability, making them a reliable choice for heavy-duty applications. Flange bolts are often used in conjunction with a flange nut to provide a secure and stable joint that can withstand high levels of stress and vibration.

At a Glance: Our Top Picks

M5 Flanged Hex Bolts A2 Stainless Steel Cover #TOP 1
M5 Flanged Hex Bolts A2 Stainless Steel
ftb score rating icon 9.8
sourcing map M10 Hex Serrated Flange Bolts Cover #TOP 2
sourcing map M10 Hex Serrated Flange Bolts
ftb score rating icon 9.7
sourcing map M8 Hex Serrated Flange Bolts Cover #TOP 3
sourcing map M8 Hex Serrated Flange Bolts
ftb score rating icon 9.5

Top 10 Flange Bolts

#TOP 1

M5 Flanged Hex Bolts A2 Stainless Steel

FlangedHexBoltsA2
Silver
M5 x 16mm
M5 Flanged Hex Bolts A2 Stainless Steel Cover
M5 x 16mm Flanged Hex Bolts Fully Threaded A2 Stainless Steel - Secure Fastening Solution for Various Applications (Pack of 10)

The M5 Flanged Hex Bolts are crafted from A2 Premium Stainless Steel, ensuring a secure grip and even load distribution for your projects. Their fully threaded design makes them versatile for various applications, from automotive body panelling to food industry uses where corrosion resistance is crucial. You’ll appreciate their durability and reliability, especially in indoor environments. These hexagonal shape bolts are perfect for interior balustrades, handrails, and shelving supports, making them a convenient choice for your fastening needs.

What We Like
Corrosion-resistant A2 stainless steel
Fully threaded for secure grip
Versatile for various applications
Available in multiple sizes
#TOP 2

sourcing map M10 Hex Serrated Flange Bolts

a22031900ux0111
Black
M10x30mm
sourcing map M10 Hex Serrated Flange Bolts Cover
sourcing map M10-1.5x30mm Hex Serrated Flange Bolts 10.9 Grade Carbon Steel Screws 5pcs

The sourcing map Flange Bolts are made from high-strength 10.9 grade carbon steel, ensuring durability for various applications. With a length of 30mm and a pitch of 1.5mm, these bolts are suitable for assembling and maintaining household items, machine tools, and construction projects. The black oxide coating provides wear resistance and anti-corrosion benefits, making them ideal for outdoor use. The circular serrated flange design helps distribute load effectively, preventing loosening and ensuring stability in your installations.

What We Like
High-strength carbon steel
Wear-resistant black oxide coating
Effective load distribution
Versatile for various applications
Easy installation with a wrench
#TOP 3

sourcing map M8 Hex Serrated Flange Bolts

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M8x20mm
sourcing map M8 Hex Serrated Flange Bolts Cover
sourcing map M8-1.25x20mm Hex Serrated Flange Bolts 10.9 Grade Carbon Steel Screws 10pcs

The sourcing map Flange Bolts are made from high-strength 10.9 grade carbon steel, ensuring durability and resistance to wear and corrosion. With dimensions of M8 x 20mm, these bolts are suitable for various applications, including household assembly and maintenance tasks. The circular serrated flange under the head provides a secure fit, distributing load effectively and preventing loosening over time. This design feature adds convenience, allowing you to rely on their stability in your projects.

What We Like
High strength and durability
Corrosion-resistant black oxide finish
Versatile for various applications
Serrated flange prevents loosening
#TOP 4

A2 Stainless Steel Flanged Button Head Screws

ISO 7380
Silver
M6 x 25mm
A2 Stainless Steel Flanged Button Head Screws Cover
A2 Stainless Steel Flanged Button Head Screws Bolts Allen Socket with Collar (Pack of 20) (M6 x 25mm)

The Screws City Flanged Screws are made from durable A2 stainless steel, ensuring long-lasting performance and resistance to corrosion. This pack contains 20 screws, making it convenient for various projects, whether you are working on repairs or new constructions. The M6 x 25mm size is versatile, suitable for different applications. With their button head design, these screws provide a sleek finish and ease of use, allowing you to tighten them with an Allen socket effortlessly.

What We Like
Durable A2 stainless steel
Pack of 20 screws
Versatile M6 x 25mm size
Sleek button head design
#TOP 5

sourcing map M10 Hex Serrated Flange Bolts

a22031900ux0110
M10x25mm
sourcing map M10 Hex Serrated Flange Bolts Cover
sourcing map M10-1.5x25mm Hex Serrated Flange Bolts 10.9 Grade Carbon Steel Screws 10pcs

The sourcing map Flange Bolts are made from high-quality 10.9 grade carbon steel, ensuring excellent strength and durability for your projects. With a length of 25mm and a pitch of 1.5mm, these bolts are versatile for various applications, such as household assembly and construction tasks. The black oxide coating provides wear resistance and anti-corrosion properties, making them suitable for long-term use. Additionally, their circular serrated flange helps distribute load effectively, preventing loosening over time, giving you peace of mind in your installations.

What We Like
High strength and durability
Wear-resistant and anti-corrosion
Versatile for many applications
Effective load distribution
#TOP 6

YEEZET 56PCS M8 Stainless Steel Bolts and Nuts Kit

YEEZET
Acier inoxydable 304
YEEZET 56PCS M8 Stainless Steel Bolts and Nuts Kit Cover
YEEZET 56PCS M8 Stainless Steel 304 Metric Flanged Hex Head Bolts and Nuts kit 20mm 30mm 40mm 50mm

The YEEZET M8 Bolts and Nuts are crafted from high-quality 304 stainless steel, ensuring they are rust-resistant and highly durable. This makes them ideal for various applications, providing you with peace of mind in both home and industrial settings. With multiple sizes available, you can choose the perfect fit for your project. The uniform size and pitch allow for a secure grip, reducing the risk of slippage during use. Additionally, the practical packaging keeps everything organised and easy to access, making your DIY tasks more efficient.

What We Like
High-quality stainless steel material
Multiple sizes for versatility
Secure grip prevents slippage
Convenient packaging for storage
#TOP 7

sourcing map M8x60mm Stainless Steel Flange Bolts

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M8x60mm
sourcing map M8x60mm Stainless Steel Flange Bolts Cover
sourcing map M8x60mm Hex Serrated Flange Bolts Screws Metric Thread 304 Stainless Steel 5pcs

The sourcing map Flange Bolts are made from durable 304 stainless steel, ensuring excellent corrosion resistance whether used in wet or dry environments. With a dimension of M8 x 60mm, these bolts are perfect for various applications, including household assembly and maintenance, making them a versatile choice for DIY projects. The circular serrated flange under the head not only acts as a gasket but also helps distribute load and prevent loosening, providing you with peace of mind during installation. A wrench is required for easy fastening, enhancing convenience for users.

What We Like
Corrosion-resistant stainless steel
Versatile for various applications
Serrated flange prevents loosening
Easy installation with a wrench
#TOP 8

Sourcingmap 4Pcs M10 Stainless Steel Flange Bolt

a17110200ux0128
Silver
Sourcingmap 4Pcs M10 Stainless Steel Flange Bolt Cover
Sourcingmap 4Pcs M10 x 30mm Thread 304 Stainless Steel Hex Serrated Head Flange Screw Bolt

The Sourcingmap Flange Bolt set includes four durable bolts made from 304 stainless steel, ensuring excellent resistance to corrosion. With a thread diameter of M10 and a length of 30mm, these bolts provide secure fastening for various applications. The hex width of 14.7mm allows for easy installation using a hex wrench, making your tasks more efficient. Weighing only 128g, these lightweight bolts are easy to handle while still offering robust performance.

What We Like
Durable stainless steel material
Secure fastening capability
Easy installation with hex wrench
Lightweight and manageable
#TOP 9

6mm A2 Stainless Steel Flanged Hex Head Bolts

6mm A2 Stainless Steel Flanged Hex Head Bolts Cover
6mm / M6 x 20 A2 Stainless Steel Serrated Flanged Hex Head Bolts Flange Screws DIN 6921-50 Pack

The Bolt Base Flanged Bolts are made from corrosion-resistant A2-70 stainless steel, ensuring durability in various environments. The flanged hex head design, compliant with DIN 6921 standards, provides a secure grip, making installation easier for you. With a 6mm metric thread and a pitch of 1.0mm, these bolts offer compatibility with a wide range of applications. Their length of 20mm makes them versatile for different projects, providing you with the reliability you need in fastening solutions.

What We Like
Corrosion resistant material
Secure flanged hex head
Compatible with various applications
Versatile length
#TOP 10

sourcing map M6 Hex Flange Bolts, 30pcs

a22031900ux0084
30mm
sourcing map M6 Hex Flange Bolts, 30pcs Cover
sourcing map M6-1x30mm Hex Serrated Flange Bolts 10.9 Grade Carbon Steel Screws 30pcs

The sourcing map Hex Flange Bolts are designed with precise dimensions of M6 x 30mm, ensuring compatibility for various applications. Made from high-strength 10.9 grade carbon steel, these bolts offer impressive wear resistance and anti-corrosion properties, making them suitable for both indoor and outdoor use. The unique circular serrated flange under the bolt head acts as a gasket, distributing load effectively and preventing loosening during operation. Installation is straightforward with a wrench, allowing you to secure components confidently in your DIY projects or home repairs.

What We Like
High strength, durable material
Resistant to wear and corrosion
Flange design prevents loosening
Easy installation with a wrench
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What are flange bolts used for?

Hex flange bolts are used on vehicle frames, especially truck frames, and anywhere a hex washer head bolt is needed. The large bearing surface distributes clamping force over a large area, allowing them to be used with irregular and oversized holes.

2. What is a flange bolt?

Flange bolts have a circular flange under the head that acts like a washer to distribute the load. Flange bolts that are non-serrated are sometimes called frame bolts.

3. Do you need a washer with a flange bolt?

Addition of steel washers to a fastener system is recommended to improve translation of torque input into bolt preload. Washers provide a smooth bearing surface, reducing friction between nut and flange. This effect is greatest when washers are through-hardened.

Editor's Notes

During our flange bolt research, we found 79 flange bolt products and shortlisted 10 quality products. We collected and analyzed 2,995 customer reviews through our big data system to write the flange bolts list. We found that most customers choose flange bolts with an average price of £6.94.

The flange bolts are available for purchase. We have researched hundreds of brands and picked the top brands of flange bolts, including Universal Hardware, sourcing map, Screws City, YEEZET, Uxcell. The seller of top 1 product has received honest feedback from 290 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.