Best Square Head Bolts of 2026

The uxcell Square Head Bolt is made from durable 304 stainless steel, ensuring it resists rust and wear, making it suitable for both indoor and outdoor use. With a square head design, it provides a larger bearing area which enhances its grip and stability during installation. The M6 x 20mm size is versatile, perfect for various applications such as machinery assembly, electrical connections, and DIY projects. Installation requires a wrench or plier, and for optimal fastening, it is recommended to use a nut and washer, which enhances convenience and effectiveness in securing your projects.

The Hard-to-Find Fastener Square Bolts are designed with a diameter of 1/4 inch and a length of 1 inch, making them versatile for various applications. Made from durable steel, these bolts ensure strength and longevity, giving you confidence in their performance. The zinc finish offers added protection against corrosion, enhancing their lifespan in different environments. With a square head style that fits a 3/8 wrench, you will find it easy to install and secure these bolts, streamlining your project and saving you time.

The Swpeet Square Head Bolt Kit offers a set of 90 pieces, including six different sizes of M6 square head bolts and matching hex nuts, giving you plenty of options for various projects. Made from carbon steel and galvanized for rust resistance, these bolts are durable and reliable for long-term use. The square head design provides a larger surface area for better grip, making it easier to tighten with tools like wrenches or pliers, preventing slipping. Plus, the bolts come neatly organized in a clear box, so you can quickly find the size you need and get started on your tasks without delay.

The uxcell Square Head Bolt is made from durable 304 stainless steel, offering excellent resistance to rust and corrosion, so you can rely on it for both indoor and outdoor use. Its M6 x 12mm size with a 1mm thread pitch ensures a secure fit for your projects, providing strong and stable fastening. The square-shaped head, measuring 10mm by 10mm, gives you a larger surface area to grip with a wrench or pliers, making installation easier and reducing slipping. This bolt comes in a pack of 10, giving you plenty of hardware for your machinery, construction, or DIY tasks.

Introducing the Hard-to-Find Fastener Square Head Bolts, the perfect solution for all your fastening needs. These bolts have a diameter of 5/16" and a length of 1 inch, making them ideal for a wide range of applications. Made from durable steel and finished with zinc, these bolts are built to last. The square head style provides added stability and torque, ensuring a secure and reliable connection. Whether you're working on a DIY project or a professional construction job, these bolts will not disappoint. With their high-quality construction and convenient square head design, you can trust that these Hard-to-Find Fastener Square Head Bolts will get the job done right.

The uxcell Square Head Bolt is made from durable carbon steel, giving you a strong fastener that can handle tough jobs. Its zinc-plated finish helps prevent rust, so the bolts stay reliable even in damp conditions. With a thread size of M6 x 20mm and a 1mm pitch, these bolts fit securely for a tight hold. The square head design provides a larger surface area for better grip, making it easier to tighten or loosen with a wrench or pliers. This bolt is a great choice for various projects, from fixing toilet lids to assembling machinery or furniture.

The uxcell Square Head Bolts are made from durable carbon steel, giving you strong, long-lasting fasteners that resist corrosion and wear. Their black oxide finish not only looks sleek but also adds extra protection. The square head design ensures you get even force distribution and prevents slipping, making your work safer and more precise. With smooth, accurate threads, these bolts stay tight and resist loosening over time. You’ll find them easy to install and remove using a wrench or pliers, perfect for projects that need regular maintenance or adjustments.

The Hillman Square Head Bolts are designed with a classic square head that adds a rustic and stylish touch to your projects. These bolts are threaded and cylindrical, making them strong and reliable for fastening needs. They are coated with zinc, which helps protect them from moderate rust and corrosion, so you can use them in various environments without worry. The bolts come in a 10-pack, giving you plenty of fasteners for your home improvement or construction tasks. If you want a durable and attractive bolt option, these are a solid choice.

The uxcell Square Head Bolt is made from strong carbon steel, giving you a durable and reliable fastener for your projects. Its zinc-plated finish helps protect against rust, so you don’t have to worry about corrosion over time. The bolt measures M6 x 15mm with a 1mm thread pitch, making it suitable for precise fittings and secure connections. The square-shaped head provides a larger surface area, which helps distribute pressure evenly and makes it easier for you to grip with a wrench or pliers during installation. This bolt is perfect for various uses, from machinery maintenance to DIY home repairs.

Introducing the Lexar Industrial Square Head Bolts - the perfect solution for your fastening needs. With a thread diameter of 5/8-11 and a length of 4 inches, these bolts are designed to provide a secure and reliable connection. Made with ASTM A333 specification, they are built to withstand heavy-duty applications. The square head type offers increased torque and prevents stripping, ensuring a tight and secure fit. The plain finish adds a clean and professional look to your projects. Whether you're working on construction, woodworking, or any other project that requires strong and durable fasteners, the Lexar Industrial Bolts are your go-to choice. Trust in their quality and performance to get the job done right.