Best Square Head Bolts of 2026
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Square head bolts are a type of fastener that feature a square-shaped head instead of the more common hexagonal shape. These bolts are commonly used in applications where a high level of clamping force is required, such as in heavy machinery or construction equipment. Square head bolts are known for their durability and strength, making them a popular choice for industrial and commercial projects. They are available in a variety of sizes and materials, making them suitable for a wide range of applications.
At a Glance: Our Top Picks
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9.5
Top 4 Square Head Bolts
sourcing map M10x30mm Square Head Bolt Set
The sourcing map Square Head Bolts are crafted from durable 304 stainless steel, ensuring they resist rust and corrosion. With a thread size of M10 x 30mm, they provide a secure fit for various applications. The square head design offers a larger bearing area, making them ideal for machinery assembly and maintenance. You will find them useful in diverse projects, from constructing guardrails to installing pipelines, both indoors and outdoors.
AHC MILD Steel Cup Square Bolts with Nuts
The AHC Square Bolts are designed with a round head and a square neck, ensuring they remain stationary while you tighten the nut. This feature is particularly beneficial for timber-to-timber joining, providing a secure connection. Each pack includes hex nuts, adding convenience to your projects. Moreover, the zinc plating significantly enhances resistance to corrosion, making these bolts suitable for various environmental conditions. With these attributes, you can trust that your installations will be durable and reliable.
AHCMetric MILD Zinc Plated Square Bolts M6 X 80mm
The AHCMetric Square Bolts feature a round head paired with a square neck, which helps prevent the bolt from turning while you tighten the nut, making your work easier and more secure. These bolts are ideal for joining timber to timber, providing a reliable hold for wood projects. Each bolt comes with a hex nut, so you have everything you need in one pack. Additionally, the zinc plating offers increased resistance to corrosion, helping the bolts last longer even in damp conditions.
AHC MILD Steel Cup Square Bolts with Nuts
The AHC Square Bolts are designed with a round head and square neck, ensuring they remain stationary while you tighten the nut. This feature is particularly beneficial for timber joining, providing a secure fit. Each pack includes a hex nut, making installation straightforward and efficient. Additionally, the zinc plating offers enhanced corrosion resistance, ensuring durability and longevity in various conditions. You can rely on these bolts for reliable performance in your projects.
Frequently Asked Questions (FAQs)
1. What are bolts with square heads called?
At one time, square head bolts (aka square bolts) were the industry standard before being replaced by hex head bolts. Now, they are commonly chosen for aesthetic reasons to create a rustic look in new buildings or to match existing fasteners in an old building.
2. What are square head bolts used for?
Square bolts are now most commonly used for aesthetic purposes to provide a rustic look in a new structure or to match existing fasteners in an older structure. Square lag screws are also used for these purposes. Crossarm or machine bolts are commonly supplied for the utility industry and included an added cone point.
3. What is square head shaping?
Our Square Head Bolts have a 4-sided square head instead of a 6-sided hexagonal head in a hex bolt. They have a square shaped wrenching head which is used with a square nut. ... Square head bolts have a greater bearing section for gripping. They allow for more tightening than a hex head.
During our square head bolt research, we found 129 square head bolt products and shortlisted 4 quality products. We collected and analyzed 7,768 customer reviews through our big data system to write the square head bolts list. We found that most customers choose square head bolts with an average price of £20.00.
The square head bolts are available for purchase. We have researched hundreds of brands and picked the top brands of square head bolts, including sourcing map, AHC.
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.