widget
widg-et
noun
A small, unnamed mechanical device or component, often used as a placeholder.
"He needed a small widget to complete the assembly."
Thesaurus
Synonyms: thingumajig, gizmo, whatchamacallit, whatsis, thingummy, dojigger, whatchamacallum, thingamabob, doodad, gubbins, doohickey, thingumabob