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expand
expanded
expanded metal
expanding flake
expanse
expansile
expansion
expansion board
expansion bolt
expansion card
expansion draft
expansion joint
expansion slot
expansionary
expansionism
expansive
expat
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expansion bolt

ex·pan·sion bolt (plural ex·pan·sion bolts)


noun 
Definition:
 
bolt with an expanding attachment: a bolt with an attachment on the screw end that expands as the bolt is tightened, thereby securing it

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