fastener

US /ˈfæs.ən.ɚ/
UK /ˈfæs.ən.ɚ/
"fastener" picture
1.

a device such as a button, buckle, or zipper that closes or secures something

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The zipper is a common fastener on clothing.
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Make sure all the fasteners on your backpack are secure.
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claspclipbucklesnaphook
2.

a hardware device that mechanically joins or affixes two or more objects together

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Nails and screws are common types of mechanical fasteners.
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The engineer specified high-strength fasteners for the bridge construction.
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boltrivetclamppinscrew
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fasten