Important Point
What Is Nail?
Nail is the most common fasteners used in construction. Up to the end of the Colonial period, all nail used in the United States were handmade.
They were forged on an anvil from nail rods, which were sold in bundles.
These nail rods were prepared either by rolling iron into small bars of the required thickness or by the much more common practice of cutting plate iron into strips by means of rolling shears.
Nail is available in a wide range of sizes, materials, and shapes, geared to a particular use or purpose Fastening with nail is the fastest and easiest way to connect wood members, requiring no predrilling or preparation, as they are driven into wood members with a hammer or a pneumatic gun.
Nail is most often made of mild steel but is available in a variety of other metals such as aluminium, copper, zinc, brass, or stainless steel.
While the rest of the world measures a nail’s diameter and length in millimetres. in the U.S. they are measured in a term called pennies and designated as d.
A 2d nail is one inch (25 mm) long, a 6d nail is two inches (51 mm) long, and a 10d nail is three inches (76 mm) long. The two types most often used in construction are common and finish nail.
Common nail has flat heads are used in most construction framing and are not intended to be exposed to the environment.
A galvanized nail has a protective zinc coating on them to inhibit rust and corrosion. Finish nail is not meant to be seen; they have a tiny head and are used in finish woodwork such as casework and interior detailing.
Other types of the nail are box nail, casing nail, brad nail, roofing nail, cut nail, and concrete nail, each shaped differently in terms of its head, shaft, and point, to suit their particular use.
Also, read: Bolt Vs Screw | What Is Bolt | What Is Screws
What Is Screw?
A screw may be defined as an inclined plane wrapped around a nail and characterized by a helical ridge.
In other words, it is a long metal shaft with threads circling along its length. It also has a turning where a screwdriver can be used to rotate the screw.
A screw generally has a head with a specially formed shape. The shape determines and heads size the size of the tool to be used to turn or drive the screw. Commonly used tools are wrenches and screwdrivers.
The underside part of the head is a shank that can be fully or partially threaded. A screw thread is a structure on a coned or cylindrical shape in the form of a helix.
The top of the ridge is known as a crest and the bottom root. The distance between the crest of the one thread to the next one is known as a pitch.
Screws are tightened by rotating the tool anticlockwise or clockwise and are usually used for joining materials that don’t have existing holes in them.
The most common types of screws used in manufacturing are drywall screws, dowel screws, mirror screws, and concrete screws.
The strength of a screw relies on the width of the thread and the distance between them. However, the more numbers of the threads, the more rotations would be required to attach the screw.
Also, if the continuous distance thread is wider, more force must be exerted on the tool in the rotations.
Screws are widely used in many applications. From motorcycles to furniture, from air conditioners to kid’s remote control cars.
Also, read: Difference Between CPM and PERT | What Is CPM & PERT
Difference Between Nails And Screws
| Sr.No. | Nails | Screws |
| 1 | The nail is less brittle, so they provide greater shear strength. | Screws, on the other hand, may not be as forgiving, but their threaded shafts hold better in wood and draw boards together much more tightly and they have greater tensile strength. |
| 2 | A nail and a screw because the shank on a nail is smooth and doesn’t have threads | Screws look somewhat similar has threaded. |
| 3 | A nail has more flexibility | Screws have more tensile strength. |
| 4 | Nail is fasteners with a flat head, smooth shank and sharp point. | Screws are fasteners with a drive located in the head and threading that protrudes down the length of the shank. |
| 5 | Nail is driven by a hammer into materials to hold them together. They can be installed faster and are cheaper than screws. In this case (and to explain the theory), we will be using a smooth shank screw as our example. | Screws (most of the time) require a pre-drilled hole and can often cut their own threads into materials they are rated for. For the sake of argument, we are going to be discussing a deck screw for this example. Deck screws are exceptionally engineered to hold two boards of wood together tightly and efficiently. |
| 6 | Shear strength is the amount of force a fastener can handle from the sides. A nail has more elasticity than a screw. This means as forces are pushed against the sides of a nail, the nail can bend slightly to accommodate these pressures. | A screw conversely has very little shear strength. Screws that are bent will almost always snap when trying to be straightened. |
| 7 | Nail is often preferred for large projects, like house framing and installing hardwood floors, because they are typically stronger and less expensive than screws. | Screws, in contrast, are favoured for small and mid-sized projects, such as woodworking and decking, because they offer more control when inserting and extracting. |
| 8 | Nail is often the first choice for framing, construction, and carpentry. | Screws are a favourite fastener of woodworkers because, for example, they can be used to build jigs (temporary structures that guide and keep work consistent) for smaller projects like installing hinges. |
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