7 Square Nuts – Which One Is The Best?

square nuts
q? encoding=UTF8&ASIN=B07BNYSFDB&Format= SL160 &ID=AsinImage&MarketPlace=US&ServiceVersion=20070822&WS=1&tag=captaintool 20&language=en USPrime-Line 9192638 Square Nuts  5/5Check Price
q? encoding=UTF8&ASIN=B07PJMQV4X&Format= SL160 &ID=AsinImage&MarketPlace=US&ServiceVersion=20070822&WS=1&tag=captaintool 20&language=en US Yoohey 90PCS M3 M4 M5 304 Stainless Steel Square Nuts4.9/5 Check Price
q? encoding=UTF8&ASIN=B07RNZSQ6H&Format= SL160 &ID=AsinImage&MarketPlace=US&ServiceVersion=20070822&WS=1&tag=captaintool 20&language=en US uxcell M8 Square Nuts, 304 Stainless Steel Metric Coarse Thread Assortment Kit, 10 4.8/5Check Price
q? encoding=UTF8&ASIN=B07W6TVD59&Format= SL160 &ID=AsinImage&MarketPlace=US&ServiceVersion=20070822&WS=1&tag=captaintool 20&language=en US 150Pcs 304 Stainless Steel 6 Sizes Metric Square Nuts Assortment Kit4.5/5 Check Price
q? encoding=UTF8&ASIN=B07W6TN1YC&Format= SL160 &ID=AsinImage&MarketPlace=US&ServiceVersion=20070822&WS=1&tag=captaintool 20&language=en US Swpeet 220Pcs 304 Stainless Steel 6 Sizes Metric Square Nuts Assortment Kit 4.3/5Check Price
q? encoding=UTF8&ASIN=B089Q6C4CM&Format= SL160 &ID=AsinImage&MarketPlace=US&ServiceVersion=20070822&WS=1&tag=captaintool 20&language=en US Suiwotin 100PCS Zinc Plated M3 Square Nuts 4.6/5Check Price
q? encoding=UTF8&ASIN=B00L1L7DZW&Format= SL160 &ID=AsinImage&MarketPlace=US&ServiceVersion=20070822&WS=1&tag=captaintool 20&language=en USHard-to-Find Fastener Coarse Square Nuts  4.3/5Check Price

Which square nut is the best one? As it turns out, that’s a difficult question to answer. Square nuts come in so many different shapes and sizes, as well as materials. There are different types of nuts available in the market: hex nut, self locking nut, jam nut,  square nut, etc. In this article, we’ll review 7 of the most popular types of square nuts!

What Is A Square Nut?

Square nuts are the nut’s name with four sides, which is different from round nuts found in most hardware stores.

Needing to use square or four sided nuts can be quite confusing for some people because they do not know much about them beyond what type of project it may fit into. It might seem like a simple thing, but many types of square nuts are used for many different projects.

When you need to work with this type of nut, it is important to know which ones fit into your project and the difference between them. This can greatly impact how well something will turn out when you are done working on it.

Knowing the differences between each type of square nut can help you make the decision on which ones to purchase for your project.

The Top 7 Square Nuts

1. Prime-Line 9192638 Square Nuts

q? encoding=UTF8&ASIN=B07BNYSFDB&Format= SL160 &ID=AsinImage&MarketPlace=US&ServiceVersion=20070822&WS=1&tag=captaintool 20&language=en USMore Details

These high-quality square nuts from Prime-Line are 5/16 inches in size and have been designed to fit securely on a bolt, cap screw, or threaded rod of the same thread size. 

These square nuts will also typically be used in combination with a washer for extra grip.

  • Durable
  • High quality

    2. Yoohey 90PCS M3 M4 M5 304 Stainless Steel Square Nuts

    q? encoding=UTF8&ASIN=B07PJMQV4X&Format= SL160 &ID=AsinImage&MarketPlace=US&ServiceVersion=20070822&WS=1&tag=captaintool 20&language=en USMore Details

    Tired of having the wrong size bolt when you’re in a hurry? This assortment kit will leave nothing to worry about. With sizes from M3-M4- M5, this pack includes round and hex type nuts in a variety of lengths. You’ll never have to run all over town trying to make it home at the eleventh hour! 

    This set is packed by Nuts Assortment Kits manufacturer Yoohey with 90 pieces of each nut that are made from 304 stainless steel for long-lasting durability and quality. Please check your project’s description before purchasing this product to ensure compatibility. We trust these high-grade parts won’t let you down.

    • Good quality nuts
    • For any type of projects

      3. uxcell M8 Square Nuts, 304 Stainless Steel Metric Coarse Thread Assortment Kit, 10 Pcs

      q? encoding=UTF8&ASIN=B07RNZSQ6H&Format= SL160 &ID=AsinImage&MarketPlace=US&ServiceVersion=20070822&WS=1&tag=captaintool 20&language=en USMore Details

      This uxcell M8 Square Nut 304 Stainless Steel Metric Coarse Thread Assortment Kit is great for in or out-of-the-house construction projects. This assortment kit comes with a total of 8 nuts. 

      This very brand-specific selection makes this versatile product your one-stop shop for building that new deck, installing the newest appliances in your kitchen, or running cables into that unfinished shed outback! 

      Each nut has an individual metal coating to keep it rust-free and looking sleek without costing too much money at all – these are so affordable you really don’t have any excuses not to replace every single bolt on your bike with them before season goers get here. You won’t regret this purchase!

      • Rustproof
      • For decoration, furniture etc

        4. 150Pcs 304 Stainless Steel 6 Sizes Metric Square Nuts Assortment Kit

        q? encoding=UTF8&ASIN=B07W6TVD59&Format= SL160 &ID=AsinImage&MarketPlace=US&ServiceVersion=20070822&WS=1&tag=captaintool 20&language=en USMore Details

        The cheapest, easiest way to spend our money these days is on hardware. And for this, you need quality craftsmanship and quality staples. 

        Take a look at our bulk 150Pcs 6 Sizes Metric Square Nuts Assortment Kit – 304 Stainless Steel with a corrosion-resistant galvanized finish to ensure lifetime use. The variety of sizes will make sure that no matter the size or usage, you are prepared with what you need!

        • Made with high-quality stainless steel
        • Corrosion-resistant
        • for home, DIY, business, use

          5. Swpeet 220Pcs 304 Stainless Steel 6 Sizes Metric Square Nuts Assortment Kit

          q? encoding=UTF8&ASIN=B07W6TN1YC&Format= SL160 &ID=AsinImage&MarketPlace=US&ServiceVersion=20070822&WS=1&tag=captaintool 20&language=en USMore Details

          As a constant in today’s industrial and construction machines, the 304 Stainless Steel Square Nuts are used for many purposes. 

          Whether you need an easier way to fix your daily life tools or want some extras on hand for emergencies, you can count on the Swpeet 220Pcs 304 Stainless Steel 6 Sizes Metric Square Nuts Assortment Kit.

          • Durable
          • Corrosion resistance
          • Affordable
          • Great for the price

            6. Suiwotin 100PCS Zinc Plated M3 Square Nuts

            q? encoding=UTF8&ASIN=B089Q6C4CM&Format= SL160 &ID=AsinImage&MarketPlace=US&ServiceVersion=20070822&WS=1&tag=captaintool 20&language=en USMore Details

            The same round nut that has been around for years is not the only solution to your fastening needs. Suiwotin Zinc Plated M3 Bar Nuts are a great alternative because they have four sides instead of just one, meaning there are more gripping surfaces so these nuts can be tightened without slipping out. 

            They hold tight yet are loose enough to pop off with little effort when you need them off. Compared to traditional bolts, the flat contact area gives this fastenings metal hold strength and ensures against loosening due to vibration or shock loading while offering features of higher tensile capacity than conventional bolts of similar thread size. 

            If you’re looking for tough nuts that keep their grip, look no further!

            • For any type of project
            • Durable
            • High quality

              7. Hard-to-Find Fastener Coarse Square Nuts

              q? encoding=UTF8&ASIN=B00L1L7DZW&Format= SL160 &ID=AsinImage&MarketPlace=US&ServiceVersion=20070822&WS=1&tag=captaintool 20&language=en USMore Details

              Keep your appliance or car well-oiled and running smoothly with Hard-to-Find Fastener Coarse Square Nuts. When you use these nuts, they can attach to any bolt head and thereby keep things nice and tight! 

              No one will ever be able to tell that these weren’t original nuts, either: they’re zinc-plated steel and come in a variety of coarse thread types.

              • Well made
              • Perfect fit
              • Good quality

                How Pick The Perfect Square Nuts?

                Consider the following when picking the perfect square nuts for your project:


                The material should be high quality to ensure that it will last a long time. Stainless steel is durable, but nylon or plastic are also good options depending on what you’re using them for.


                If you need specific sizes then make sure you get ones that fit correctly with your screws and bolts.


                Consider how much you’re willing to spend on the nuts and find a kit that is within your price range, but still has enough pieces for your project.


                The square nuts should be made from high-quality material for durability. It’s important that they are strong enough to keep your screws in place without slipping out, but also easy enough to remove when necessary.  


                The price of a square nut is different depending on the brand and size. You should choose a square nut that is within your price range but has enough pieces for your project.

                Square Nuts FAQ’s

                How many square nuts are there in a set?

                Depends on the size and quantity of each set. Usually, they have from 100 to 1000 pieces per set, but some kits may go up to 300000 pieces for commercial use.

                What is the difference between locknuts and regular nuts?

                A normal nut can be easily removed with a wrench or pliers where locknuts are more difficult to open due to their design.

                Is it possible for a square nut to slip?

                The thread of the screw should be completely covered by the walls on all four sides so that it can’t move, but sometimes they do still slip if not properly tightened. If you’re concerned, you can put a drop of glue on the threads to prevent that from happening.

                Where should I use square nuts?

                You can find them in many things ranging from decorative household objects, sports equipment, and even some toys. They’re usually used for construction or hardware projects because they are durable enough to hold up to daily wear and tear without breaking apart.

                How do I use a square nut?

                It’s just like using any other type of nut that you would tighten with a wrench or pliers, but they may be difficult to open if not done correctly, so make sure the thread walls completely cover the screw on all four sides. The threads should also have something sticky applied to them, such as grease or glue, so it doesn’t slip out.

                What is a square nut made of?

                It depends on the brand and quality, but they are usually metal like steel, brass, aluminum, and zinc alloy. Depending on the type of use you have in mind for them, they can also be plastic or nylon.

                Am I able to buy individual nuts?

                Most kits come with 100-300 pieces, so if you only need a few, then it’s best to purchase something that has just what you need instead of buying the whole kit again. Also, be aware that some sets are designed for commercial use, which can have up to 300000 pieces per kit.



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