Best Structural Bolts of 2026

Brian Howie Avatar
Brian Howie
Last Updated: Jan 8, 2026

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Structural bolts are heavy-duty fasteners specifically designed for use in structural applications. These bolts are commonly used to connect heavy steel components, such as beams, columns, and trusses, in construction projects. They are made from high-strength materials, such as carbon steel or alloy steel, which provide the necessary strength and durability to withstand heavy loads and ensure the structural integrity of the building. Structural bolts typically have a larger diameter and a higher tensile strength compared to standard bolts, making them suitable for demanding applications where safety is paramount.

At a Glance: Our Top Picks

Ozco OWT Timber Bolts 56651 Cover #TOP 1
Ozco OWT Timber Bolts 56651
ftb score rating icon 9.9
Conquest Fasteners A325 Hot Dip Galvanized Hex Bolts 1/2"-13 x 1-1/2" (25 Pack) Cover #TOP 2
Conquest Fasteners A325 Hot Dip Galvanized Hex Bolts 1/2"-13 x 1-1/2" (25 Pack)
ftb score rating icon 9.8
Conquest Fasteners A325 3/4"-10 x 2" Hex Structural Bolts (25 Pack) Cover #TOP 3
Conquest Fasteners A325 3/4"-10 x 2" Hex Structural Bolts (25 Pack)
ftb score rating icon 9.6

Top 10 Structural Bolts

#TOP 1

Ozco OWT Timber Bolts 56651

56651
Black
2 Pack
Ozco OWT Timber Bolts 56651 Cover
OZCO Building Products

The Ozco Timber Bolts are designed to enhance your building projects with their impressive features. Each pack includes two robust bolts measuring 3/4-inch by 8-10-inch, perfect for various structural applications. You can easily pre-drill using a 3/4-inch auger bit, ensuring a precise fit. To secure the bolts, a 3/8-inch hex driver is required, allowing for straightforward tightening. Not only do these bolts provide strength and stability, but they also boast an attractive appearance, making them a great choice for visible structures.

What We Like
Attractive design
Easy to install
Durable steel construction
Versatile size options
#TOP 2

Conquest Fasteners A325 Hot Dip Galvanized Hex Bolts 1/2"-13 x 1-1/2" (25 Pack)

SBHDG-12X112-25PK
1/2"-13 x 1-1/2"
Conquest Fasteners A325 Hot Dip Galvanized Hex Bolts 1/2"-13 x 1-1/2" (25 Pack) Cover
Conquest Fasteners 1/2"-13 x 1-1/2" A325 Type 1 Heavy Hex Structural Bolts (25 Pack) - Hot Dip Galvanized

The Conquest Hex Structural Bolts are designed for strength and durability, featuring a 1/2-inch diameter and 1-1/2 inch length, ideal for precise fit and secure fastening. With 13 threads per inch, these bolts provide a tight grip, ensuring your steel connections hold firm. Made from carbon steel, they offer reliable toughness for heavy-duty use. The hot dip galvanized finish protects against rust and corrosion, making them perfect for outdoor or industrial environments. This 25-pack gives you plenty of bolts to handle multiple projects, making these bolts a convenient and sturdy choice for your structural needs.

What We Like
Durable carbon steel
Corrosion-resistant galvanized finish
Standard 1/2" diameter and length
Secure 13 threads per inch
Pack of 25 bolts
#TOP 3

Conquest Fasteners A325 3/4"-10 x 2" Hex Structural Bolts (25 Pack)

SB-34X2-FT-25PK
3/4"-10 x 2"
Conquest Fasteners A325 3/4"-10 x 2" Hex Structural Bolts (25 Pack) Cover
Conquest Fasteners 3/4"-10 x 2" A325 Type 1 Fully Threaded Heavy Hex Structural Bolts (25 Pack) - Plain Finish

The Conquest Fasteners Hex Bolts come in a convenient pack of 25, giving you plenty of heavy-duty bolts for your projects. Each bolt measures 3/4 inch in diameter and 2 inches long with 10 threads per inch, making them suitable for precise structural connections. Made from strong carbon steel, these bolts provide reliable durability for demanding tasks. Their plain finish meets ASTM A325 standards, offering you corrosion resistance and long-lasting performance. These fully threaded hex head bolts are designed specifically for steel-to-steel connections, ensuring a secure and robust hold in your construction work.

What We Like
Durable carbon steel material
Meets ASTM A325 standards
Fully threaded design
Plain corrosion-resistant finish
Includes 25 bolts per pack
#TOP 4

Conquest Fasteners A325 3/4"-10 x 2" Fully Threaded Hex Bolts

SB-34X2-FT-10PK
3/4"-10 x 2"
Conquest Fasteners A325 3/4"-10 x 2" Fully Threaded Hex Bolts Cover
Conquest Fasteners 3/4"-10 x 2" A325 Type 1 Fully Threaded Heavy Hex Structural Bolts (10 Pack) - Plain Finish

The Conquest Fasteners Hex Bolts are 3/4 inch in diameter and 2 inches long, making them suitable for a range of construction tasks. With 10 threads per inch, these bolts offer a strong grip for secure fastening. Made from carbon steel, they provide durability and strength for demanding projects. The plain finish not only meets ASTM A325 standards but also helps resist corrosion, ensuring your connections last over time. These fully threaded hex head bolts are designed specifically for steel-to-steel structural connections, giving you reliable and sturdy support when working on heavy-duty builds.

What We Like
Durable carbon steel material
Corrosion-resistant plain finish
Fully threaded for strong grip
Meets ASTM A325 standards
Includes 10 bolts per pack
#TOP 5

GRK 3/8" x 8" Structural Screws

GRK
772691122872
Gold
3/8" x 8"
GRK 3/8" x 8" Structural Screws Cover
GRK 772691122872 3/8" x 8" 12287 RSS Rugged Structural Screws 50 Count, Gold

The GRK Structural Screws are an excellent alternative to traditional lag screws for fastening structural wood. Their design makes installation a breeze, allowing you to complete projects efficiently. These screws are code approved for wood-to-wood applications, ensuring they meet safety standards for both interior and exterior use. The integrated washer head enhances clamping force, providing a secure fit that boosts the strength of your connections. By choosing these screws, you can enjoy peace of mind knowing your structural projects are reliable and durable.

What We Like
Easy installation
Code approved
Interior/exterior use
Strong clamping force
#TOP 6

Conquest Fasteners A325 3/4" x 2" Hot Dip Galvanized Structural Bolts (25 Pack)

SBHDG-34X2-25PK
3/4"-10 x 2"
Conquest Fasteners A325 3/4" x 2" Hot Dip Galvanized Structural Bolts (25 Pack) Cover
Conquest Fasteners 3/4"-10 x 2" A325 Type 1 Heavy Hex Structural Bolts (25 Pack) - Hot Dip Galvanized

The Conquest 3/4" Structural Bolts come in a convenient pack of 25, making it easy for you to stock up and complete your projects without frequent trips to the store. Each bolt measures 3/4 inch in diameter and 2 inches long, with 10 threads per inch, providing a precise fit for your steel connections. Made from durable carbon steel, these bolts are built to last and hold strong under heavy loads. Plus, the hot dip galvanized finish offers excellent corrosion resistance, so you can trust these bolts to perform well even in harsh outdoor conditions.

What We Like
Durable carbon steel
Hot dip galvanized finish
25 bolts per pack
Precise threading
#TOP 7

Conquest Fasteners 1/2"-13 x 7" A325 Heavy Hex Bolts

SB-12X7-25PK
1/2"-13 x 7"
Conquest Fasteners 1/2"-13 x 7" A325 Heavy Hex Bolts Cover
Conquest Fasteners 1/2"-13 x 7" A325 Type 1 Heavy Hex Structural Bolts (25 Pack) - Plain Finish

The Conquest Heavy Hex Bolts offer a reliable solution for your structural fastening needs. With a 1/2-inch diameter and 7-inch length, these bolts provide a strong hold for steel connections. Featuring 13 threads per inch, they ensure secure fastening that won't easily loosen. The hex head design allows for easy tightening with standard tools, making your installation process smoother. Made from durable carbon steel and finished plainly, these bolts meet ASTM A325 standards, ensuring you get corrosion resistance and long-lasting performance. Whether you're working on steel beams or other high-strength applications, these bolts deliver dependable support.

What We Like
Durable carbon steel material
Corrosion-resistant plain finish
Strong 1/2-inch diameter
Easy hex head installation
Meets ASTM A325 standards
#TOP 8

Hillman Group Sidewalk Bolt 100 Pack

831490
100 Pieces
1/4" x 1"
Hillman Group Sidewalk Bolt 100 Pack Cover
Hillman Group Combo Sidewalk Bolt, Hurricane Hardware, 100 Pieces, Rust-Resistant, Durable, Truss Head, (1/4" x 1") Stainless Steel Finish (831490)

The Hillman Sidewalk Bolt Pack features sturdy and reliable bolts made from durable stainless steel, ensuring they can withstand tough conditions. Their rust-resistant properties make them ideal for use in marine environments, so you can trust them to last. With 100 bolts included, you’ll have plenty to protect your home and tackle various projects. Installation is easy with the combo drive design, allowing you to use either a Phillips or slotted bit. This versatility makes your work more efficient and hassle-free.

What We Like
Durable stainless steel construction
Rust and corrosion resistant
Includes 100 bolts
Easy installation options
#TOP 9

Conquest Fasteners A325 1/2" x 1.5" Heavy Hex Bolts (25 Pack)

SB-12X112-25PK
1/2"-13 x 1-1/2"
Conquest Fasteners A325 1/2" x 1.5" Heavy Hex Bolts (25 Pack) Cover
Conquest Fasteners 1/2"-13 x 1-1/2" A325 Type 1 Heavy Hex Structural Bolts (25 Pack) - Plain Finish

The Conquest 1/2" Hex Bolts come in a convenient pack of 25, giving you plenty of fasteners for your projects. Each bolt measures half an inch in diameter and 1.5 inches long, with 13 threads per inch, making them suitable for precise and secure fastening. Made from durable carbon steel, these bolts offer strong support for your structural needs. Their plain finish meets ASTM A325 standards, helping resist corrosion and ensuring long-lasting performance in steel-to-steel connections. These heavy hex bolts are designed to provide a reliable and sturdy hold, perfect for building or repairing steel structures.

What We Like
Durable carbon steel
Meets ASTM A325 standards
25 bolts per pack
Heavy hex head design
Corrosion resistant finish
#TOP 10

Conquest Fasteners A325 Fully Threaded Hex Bolts 1/2"x2"

SB-12X2-FT-25PK
1/2"-13 x 2"
Conquest Fasteners A325 Fully Threaded Hex Bolts 1/2"x2" Cover
Conquest Fasteners 1/2"-13 x 2" A325 Type 1 Fully Threaded Heavy Hex Structural Bolts (25 Pack) - Plain Finish

The Conquest Fully Threaded Hex Bolts offer a practical solution for your structural projects. With a diameter of 1/2 inch and a length of 2 inches, these bolts provide a reliable fit for steel connections. The 13 threads per inch design ensures a secure hold, making installation easier and more stable. Made from durable carbon steel with a plain finish, they meet ASTM A325 standards, giving you confidence in their strength and corrosion resistance. The fully threaded hex head design makes these bolts versatile and easy to work with, ideal for heavy-duty steel-to-steel connections.

What We Like
Durable carbon steel material
Meets ASTM A325 standards
Fully threaded for strong grip
Hex head for easy installation
Pack of 25 bolts
Buying Guide Image
Editor's Notes

During our structural bolt research, we found 24 structural bolt products and shortlisted 10 quality products. We collected and analyzed 6,268 customer reviews through our big data system to write the structural bolts list. We found that most customers choose structural bolts with an average price of $26.23.

The structural bolts are available for purchase. We have researched hundreds of brands and picked the top brands of structural bolts, including Ozco, Conquest Fasteners, GRK, Hillman. The seller of top 1 product has received honest feedback from 384 consumers with an average rating of 4.7.

Written by
Brian Howie Avatar

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.