Not all nuts have six sides. While most of them do, in fact, have a hexagonal shape, others have a square shape. Known as square nuts, they are used in conjunction with a bolt to hold two or more objects together.

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Square nuts have the same threaded interior as their hexagonal counterparts. They feature internal threading that supports the external threading of a bolt. The difference lies in their shape. With their square shape, square nuts only have four sides, compared to the six sides for hexagonal nuts. This alternative shape offers several benefits.

Protection From Loosening

Square nuts are better protected from loosening than hexagonal nuts. Loosening involves a nut working its way off the bolt to which it’s attached. You can attach hexagonal and square nuts alike by twisting them onto the end of a bolt. Over time, however, some nuts may loosen. But square nuts cover more surface area of the objects with which they are used, so they are better protected from loosening.

Easier to Keep Track Of

You’ll have an easier time keeping track of square nuts than hexagonal nuts. Nuts and other fasteners have a tendency to roll away when dropped. You may accidentally drop a bolt or nut, only to watch it roll away into the abyss where you’re unable to retrieve it.

Hexagonal nuts are rounder than square nuts. This semi-round shape allows them to roll away when dropped. Square nuts aren’t round. If you accidentally drop a square nut, it will typically stay in place. This makes square nuts easier to keep track of.

Wrench Tightening

You can tighten square nuts using a standard wrench. Hexagonal nuts support wrench tightening as well, but with six sides, you may struggle to grip them with a wrench. Square nuts have fewer but larger sides. As long as you have enough space, you should be able to easily place a wrench around two of these sides so that you tighten the square nut.

Available in a Variety of Styles

Square nuts are available in a variety of styles. They all feature a square shape consisting of four sides of equal length. With that said, some square nuts feature different characteristics than others.

Some square nuts are made of stainless steel, whereas others are made of carbon steel. You can also find square nuts in different sizes, including metric and standard sizes.

Advantages Of Using A Square Nut Nuts and bolts come in a wide range of shapes and designs, including the commonly used hex shape. Using a square nut (along with a square head bolt) provides quite a few advantages in certain applications, from railway lines to electronics and construction projects. Find the hardware solutions you’re looking […]

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Advantages Of Using A Square Nut

Nuts and bolts come in a wide range of shapes and designs, including the commonly used hex shape. Using a square nut (along with a square head bolt) provides quite a few advantages in certain applications, from railway lines to electronics and construction projects.

Find the hardware solutions you're looking for here. 

Here are the top four benefits this less popular nut shape:

Benefit # 1 – Easy To Tighten

Because of the four-sided shape, square nuts and square headed bolts are very simple to tighten. Your tool simply grips two opposite sides to tighten and loosen these fasteners, as opposed to fitting snugly onto a hex shaped head.

Using a simple grip or pinch on this nut may not provide adequate strength when working with an older or corroded fastener. But most often this simple method of installation and retraction proves to be a benefit.

Benefit # 2 – Quick Gauge

When measuring the position of nuts, the square shape also acts as a quick gauge. Railroad laborers found this especially beneficial, since a properly tightened square head bolt and square nut would sit parallel to railroad ties. If the nut or bolt head was at an angle, it needed to be tightened further. This quick visual gauge makes for simple inspections and reduces the risk of fastener failure on many different applications

Benefit # 3 – Perfect For Blind Locations

Square nuts can be tightened with pliers or a wrench, making them ideal for use in blind locations. Laborers can tighten and loosen a square shaped fastener without having it in sight, as long as a sturdy grip can be obtained on two opposing sides of the nut or bolt head.

Benefit # 4 – Perfect For Tight Locations

For the same reasons stated above, the square nut and square head bolt are ideal for use in tight locations. Needle nosed pliers have an extended reach for working with tight or narrow confines, and the use of square shaped fasteners makes sense when this type of tool is used to tighten and loosen the joint. This principle works well in electronics, where tiny spaces are filled with small square head bolts and square nuts.

When your application calls for efficiency and adaptability, consider using a square shaped fastener such as the square nut.

Take advantage of these benefits and discover a world beyond the common hex nut.

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