How does the screw differ from the screw? What is the difference?

As you know, various fastener details are present in many products. And most people face this constantly. Especially it concerns building and repair works. So what to use to fix these or other materials or structures? What is the difference between a screw and a screw, what is the difference between these fasteners?

It would seem, at first glance, these products are no different from each other. For a long time it was believed that the screw is a prototype of the samorez. But do not make premature conclusions. Before performing repair work it is better to understand in detail what the screw differs from the screw. Photos of these fasteners are presented in the article. At first glance, they are similar, but in fact there are many differences.

What is a self-tapping screw?

This is a fastening product with a special thread. It is a rod with a head that has an external thread. Self-tapping screws are made of stainless or carbon steels. Made in accordance with GOST 27017-86 "Fixing products. Terms and Definitions". To protect against corrosion at the production stage, such products are phosphated, galvanized or oxidized.

What are they for?

Self-tapping screws are designed for fastening various structures or their elements to hard substrates. Due to their self-tapping ability, they do not require additional measures, such as drilling holes. The thread on the self-tapping screws is applied to the entire cylindrical surface of the rod. Thanks to this, there is a more reliable fixation and fastening.

Varieties of self-tapping screws

Such fastening elements can differ in several parameters:

• By appointment: for metal, plastic, wood, gypsum board, etc.
• By type of head: semicircular, cylindrical, concealed, press washer (used for roofing works), truncated cone, hexagonal (used together with plastic dowels for fastening heavy objects).
• By type of tip. The tip of the screw can be sharp or made in the form of a drill. Such products are used for metal fastening.
• By the types of the slot. Simply put, under the form of a screwdriver: straight, cross, hexagon (furniture).
• By the type of thread. Frequent - for metal and plastic, rare - for woodwork. Also, there are self-tapping screws with a thread of a mixed type, more often it gets to the head less often. Such elements are used for fixing structures to concrete bases and are made of high-alloy steels.

It should be noted that self-tapping screws for fastening gypsum-fiber sheets are distinguished by a special head, it is hidden and has a thread directly on the head itself.

What is a screw?

The screw, like the self-tapping screw, is a cylindrical rod with different head types and external thread. It is intended for fastening various elements to soft bases. Has a hat and a cylindrical part, which is partially covered with thread, which makes it different from the self-tapping screw.

When screwing the screw, it is necessary to drill a hole with a diameter of up to 70% of the thickness of the screw. This is the main difference, showing how the screw differs from the screw. When working with this fastening element, it is important to choose the diameter of the drill to qualitatively perform the joining of materials. Screws provide a durable and most often non-separable connection of parts.

Where is it applied?

The peculiarity of the screw is the fact that it can be used for fastening structures with moving parts. This is possible due to the fact that part of the cylindrical base has no threads.

Types of screws

These fasteners are classified in the same way as self-tapping screws:

• Type of cap: semicircular, hidden, hexagonal, square. However, it is worth noting that the screws have a larger range of hats, so the range of their application is wider.
• According to the shape of the tip: blunt (used for screeding furniture or plastics), sharp.
• Thread of the rod: single-pass (large, frequent, shallow), two-pass (equal or variable altitude).
• Slots. Like self-tapping screws, they can be cross-shaped, straight, hexagonal.

After the above description of both products, it is possible to combine the obtained data and carry out a comparative analysis that will show how the screw differs from the self-tapping screw. This will help determine which element is more suitable in this or that case.

Than the screw differs from the self-tap: differences

Outwardly, these fasteners can be very similar, but they have a lot of differences:

• The screw is not as strong as a self-tapping screw, which is made of more resistant alloys and is used to fix a large number of materials. These include metal or concrete products. Therefore, the range of application of self-tapping screws is wider, unlike screws. At the same time, hard alloys are not always convenient when doing some work. For example, many masters noticed that when working with dense materials, sometimes the heads of the screws are simply cut off. This gives some inconvenience during the work. While the screw, made of soft material, does not break, but simply bends. It is easier to replace it with new one.

• There is also a significant difference in the technology of manufacturing these fasteners. All screws are heat treated and coated with special compounds.
• Another major difference, showing how the screw differs from the screw, is that it is not screwed in without first drilling the hole. This should be taken into account when carrying out installation work.
• If you look closely, you can clearly see how the screw differs from the screw. This is the height of the thread and its pitch. In addition, in the self-tapping thread covers its cylindrical part completely.
• Another external difference in the tips. The self-tapping screw is always sharper. However, in rare cases, there are also screws of such a plan.

Conclusion

After carrying out the comparative analysis it became clear what the screw differs from the screw. Now we can conclude that these are fixing parts that are designed to perform different tasks, although they are, in fact, the same. When performing any fastening work, you first need to figure out which elements are more appropriate to use.