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Types of Screws

A screw is a fastener with a head on one end and a pointed tip on the other end. Screws have threads that help them to dig into objects and hold them firmly.

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Types of Screws

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  1. TYPES OF SCREW By RathInfotech

  2. What is a Screw? • A screw is a fastener with a head on one end and a pointed tip on the other end. • The shaft of the screw has ridges throughout its length, which are called threads. • The difference between each thread is called a pitch. • Moreover, the head of the screw has a depression, which tells which driver or device to use to fasten objects.

  3. Purpose of a Screw • Screws have threads that help them to dig into objects and hold them firmly. • These threads create great friction and resistance and move in a circular motion, thereby attaching solid objects that cannot be separated easily. • They serve their purpose best when used for wood and drywall.

  4. Merits of Screw • The advantage of a screw lays in the no. of threads its shaft bears and the pitch (spacing) between them. If the threads are closely placed, then less energy is needed to drive a screw and vice versa. • This happens because with threads close enough, a screw turns several times thus driven quickly, while when threads are far enough, the screw turns only a few times, needing more energy to push it in.

  5. Types of Screws • Screws are available in many shapes, sizes, heads and threads. • Screws can fit easily on metal, plastic and wood, making them extremely usable across numerous industries. The most common types of Screws are: • Wood Screws • Sheet Metal Screws • Drywall Screws • Machine Screws

  6. Wood Screws • These screws have a smooth shank, with few threads and an end that is pointed. • They are employed in clasping two wood pieces together. • They are occasionally manufactured with a tapering design. • They are abbreviated as WS.

  7. Sheet Metal Screws • They have much finer threads, threaded right up till the head. • These screws are commonly self – tapping (or self-drilling or SMS), having a self-drilling point and require only a pre-drilled hole to be fixed. • They can be used on Plastic, Wood and other soft items.

  8. Drywall Screws • They have curved threads that prevent the drywall from ripping. • They have two varieties – one with threads having coarse pitches, suitable to join drywall to wood. • The other variant is finely threaded, used to attach to metal studs. • These screws are preferable in office construction work.

  9. Machine screws • These screws are combined with a nut or a tapped hole for use. • Produced with great precision, they have superior threads, used in various applications. • Often used with nuts, they are driven into pre-tapped holes and come in smaller sizes. • They are abbreviated as MS.

  10. To know more about types of screws, visit http://www.katariyasteel.com/

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