Editing Ferrule (section)

{{Short description|Ring used for fastening or joining}}
{{For|the plant of similar name|Ferula}}
{{Refimprove|date=July 2017}}
{{wiktionary}}
[[Image:Wire rope with thimble and ferrule.jpg|thumb|A [[wire rope]] terminated with a ferrule (left) and a [[Wire rope#Thimbles|thimble]] (right)]]
[[Image:Piccopipe.jpg|thumb|upright|[[Zuffolo | Picco pipe]] with nickel silver ferrule]]
[[File:brushtypes.jpg|thumb|right|upright=1.5|Non-circular ferrules holding bristles of a brush to its handle]]

A '''ferrule''' (a [[Corruption (linguistics)|corruption]] of [[Latin]] ''{{lang|la|viriola}}'' "small bracelet", under the influence of ''{{lang|la|ferrum}}'' "iron") is any of a number of types of objects, generally used for fastening, joining, sealing, or reinforcement. They are often narrow circular rings made from metal, or less commonly, plastic. Ferrules are also often referred to as '''eyelets''' or [[grommets]] within the [[manufacturing industry]].<ref>{{cite web|title=Ferrules & Eyelets |url=http://transmatic.com/Capabilities/FerrulesEyelets |publisher=Trans-Matic Manufacturing, Inc. |access-date=18 April 2014 |url-status=dead |archive-url=https://web.archive.org/web/20140419025256/http://transmatic.com/Capabilities/FerrulesEyelets |archive-date=19 April 2014 }}</ref>

Most ferrules consist of a circular [[Clamp (tool)|clamp]] used to hold together and attach [[fiber]]s, [[wire]]s, or posts, generally by [[Crimp (joining)|crimping]], [[swaging]], or otherwise deforming the ferrule to permanently tighten it onto the parts that it holds.