Best Square Nuts of 2025

The Hard-to-Find Square Nuts are designed with a 3/8-inch diameter and a thickness of 21/64 inches, making them a sturdy choice for various applications. Crafted from durable steel and finished with zinc, these nuts offer excellent resistance to corrosion, ensuring longevity. You will appreciate the convenience of using a 5/8-inch wrench for installation, simplifying your project. Whether you are working on a DIY task or a professional job, these square nuts provide reliable performance and strength, making them ideal for securing bolts in place.

The Prime-Line Square Nuts are designed to fit 1/2 inch-13 bolts, cap screws, or threaded rods of the same size. Their unique four-sided shape allows for a secure grip, ensuring that the nut stays in place during use. While they are not as common as hex nuts, they serve a specific purpose, particularly when used with a washer for added stability. Additionally, these nuts are made with a coarse thread type, which provides ease of installation and a strong connection. With specifications that meet industry standards, you can trust their reliability in various applications.

The uxcell Square Nuts are designed with a threaded size of M6 x 1mm, making them versatile for various applications. With a width of 0.78 inches and a height of 0.2 inches, these nuts fit perfectly with standard screws, providing secure connections. Constructed from carbon steel and finished with a white zinc coating, they resist rust and corrosion, ensuring durability in both indoor and outdoor settings. You can easily tighten them using a wrench, making installation straightforward and hassle-free for your projects.

The Hillman Group 3338 3/8-16 Square Nut Zinc Plated, 25-Pack, also known as the Hillman Square Nut Zinc Plated, is a versatile and convenient product for various applications. These square nuts are designed to be mated with square-headed bolts, providing a secure and sturdy connection. They can also be used as blind nuts in furniture manufacture, offering an easy and efficient way to assemble furniture pieces. The zinc-plated finish adds moderate corrosion resistance, ensuring the longevity of the nuts even in challenging environments. With a quantity of 25 nuts per pack, you'll have an ample supply for your projects. The Hillman Square Nut Zinc Plated is a reliable choice for any DIY enthusiast or professional in need of high-quality square nuts.

The Hillman Square Nut is designed to work seamlessly with square-headed bolts. Its unique shape helps distribute the load evenly, enhancing the strength of your fastener. When used alongside flat washers, these nuts prevent damage caused by sharp edges, ensuring a secure fit and increased durability. The zinc-plated finish offers moderate corrosion resistance, making it suitable for various applications. This means you can rely on these nuts in environments where moisture may be a concern, providing you with peace of mind in your projects.

The Hillman Square Nut is designed to fit perfectly with square-headed bolts, making it an essential component for various projects. Its square shape ensures a secure grip, providing stability in your applications. Additionally, these nuts can serve as blind nuts in furniture manufacturing, allowing for clean and hidden fastening solutions. With a zinc plating, they offer moderate protection against corrosion, ensuring durability over time. Each pack contains five nuts, giving you enough supply for multiple uses or repairs.

The Prime-Line Square Nuts are designed in a 4-sided shape, making them easy to handle and install. These nuts screw onto bolts, cap screws, or threaded rods that share the same thread size, ensuring a secure fit. They are often used alongside washers, providing additional stability to your projects. Although not as commonly used as hex nuts, their unique shape can be beneficial in specific applications where space is limited. With a coarse thread type and compliance with ASME specifications, these nuts offer reliability and strength for various tasks.

The Hillman Square Nut is designed for versatility and convenience. Its square shape allows it to fit perfectly with square-headed bolts, making assembly easier for various projects. You can also use it as a blind nut in furniture manufacturing, providing a neat finish to your pieces. The zinc plating offers moderate resistance to corrosion, ensuring durability over time, especially in different environments. With 30 nuts included in each pack, you’ll have plenty on hand for your needs, whether for repairs or new constructions.

Powlankou Square Nuts are made of 304 Stainless Steel, providing good strength and corrosion resistance. With a dimension of M3 (3mm), these nuts are perfect for a wide range of applications in construction, manufacturing, engineering, and more. They can be used in precision machinery, electronic products, household appliances, and even toys. The 200-piece pack ensures you have enough nuts for your various projects. The square design of these nuts allows for easy installation and ensures a secure connection with bolts and threaded rods. Upgrade your fastening needs with Powlankou Square Nuts.

The Evecad Square Nuts are made from galvanized carbon steel, ensuring excellent resistance to corrosion and wear. This means you can rely on them for both indoor and outdoor projects, enhancing their versatility. With a thread size of 1/4”-20, these nuts are strong and durable, making them suitable for a variety of applications, from furniture assembly to industrial machinery. With 30 pieces included, you’ll have plenty on hand for all your connection and assembly needs, ensuring your repairs and projects are secure and long-lasting.