screw
Sign in to savethumb|An assortment of screws, and a Quarter (United States coin)|US quarter for size comparison thumb|upright|A wood screw: a) head; b) non-threaded shank; c) threaded shank; d) tip
AI overview
A screw is a fastener with a threaded shaft and a head that can be twisted into materials to hold things together. Screws are widely used in construction, manufacturing, and everyday applications because they provide a strong, adjustable connection that can be easily removed and reused.
AI-generated from the Wikipedia summary — may contain errors.
Article
25 sectionsContents
- History
- Manufacture
- Types of screws
- Shank
- Wood screw
- Self-tapping screw
- Machine screw
- Hex cap screw
- Lag screw
- Bone screw
- Head
- Sizes
- Metric
- Inch
- Tools
- Screw threads
- ISO metric screw thread
- Whitworth
- British Association screw thread
- Unified Thread Standard
- See also
- References
- Citations
- General and cited references
- External links
thumb|An assortment of screws, and a Quarter (United States coin)|US quarter for size comparison thumb|upright|A wood screw: a) head; b) non-threaded shank; c) threaded shank; d) tip
A screw is an externally helical threaded fastener capable of being tightened or released by a twisting force (torque) to the head. The most common use of screws is to hold objects together and there are many forms for a variety of materials. Screws might be inserted into holes in assembled parts or a screw may form its own thread. The difference between a screw and a bolt is that the latter is designed to be tightened or released by torquing a nut.