fastener

n. person or thing which attaches, person or thing which fastens

A fastener is a hardware device that mechanically joins or affixes two or more objects together.Fasteners can also be used to close a container such as a bag, a box, or an envelope; or they may involve keeping together the sides of an opening of flexible material, attaching a lid to a container, etc. There are also special purpose closing devices, e.g. a bread clip. Fasteners used in these manners are often temporary, in that they may be fastened and unfastened repeatedly.
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Pin a slender, elongated piece of metal used for securing fixation of parts. Steinmann pin a metal rod for the internal fixation of fractures. [more]Fastener - Community and Resources

Noun
1. a person who fastens or makes fast; "he found the door fastened and wondered who the fastener was"
(hypernym) person, individual, someone, somebody, mortal, human, soul
(derivation) fasten, fix, secure
2. restraint that attaches to something or holds something in place
(synonym) fastening, holdfast, fixing
(hypernym) restraint, constraint
(hyponym) bellyband
(derivation) fasten, fix, secure

n. fastener