Screw: Difference between revisions

Latest revision as of 01:48, 20 February 2025

Screw

A Screw is a type of fastener, typically made of metal, and characterized by a helical ridge, known as a male thread or just thread. Screws are used to fasten materials by digging in and wedging into a material when turned, while the thread cuts grooves in the fastened material that may help pull fastened materials together and prevent pull-out.

History[edit]

The screw was first used in the Ancient Greek era. It was described by Archimedes, who is credited with its invention. The Archimedes' screw, a device for lifting water, is an early application of the screw principle.

Types of Screws[edit]

There are many types of screws, each with a particular purpose. Some of the most common types include the wood screw, the machine screw, the sheet metal screw, and the self-drilling screw.

Wood Screw[edit]

Wood screws are used primarily for connecting wood to wood. They have a pointed tip and a smooth shank near the head.

Machine Screw[edit]

Machine screws are used to hold parts together in machines, appliances, and more. They are available in a variety of head styles and materials.

Sheet Metal Screw[edit]

Sheet metal screws are used to attach pieces of sheet metal together. They have a pointed tip and threads that cover the entire length of the screw.

Self-Drilling Screw[edit]

Self-drilling screws are used in a variety of applications ranging from DIY hardware to professional construction. They eliminate the need for a pre-drilled hole.

Screw Drive Types[edit]

The drive of a screw is the shape or grooving pattern on the screw head that allows a screwdriver to engage the screw. Common types include the slotted drive, Phillips drive, Robertson drive, and Torx drive.

@@ Line 44: / Line 44: @@
 {{fastener-stub}}
+<gallery>
+File:Screws.jpg|Screws
+File:Wood screw with legend.svg|Wood screw with legend
+File:Six Mechanical Powers.png|Six Mechanical Powers
+File:Screw making machine, 1871.png|Screw making machine, 1871
+File:Brownie-4slide.jpg|Brownie 4 slide
+File:Bolt Forming.svg|Bolt Forming
+File:Screw (bolt) 13-n.PNG|Screw (bolt)
+File:Lag screw (05).jpg|Lag screw
+File:Titanium plaatje voor pols.jpg|Titanium plaatje voor pols
+File:Screw head types.svg|Screw head types
+File:Cross slot screw.jpg|Cross slot screw
+File:Hex cap screw-class 3.6.svg|Hex cap screw class 3.6
+</gallery>