Filed from 3 published puzzles

GASKET

Set to 3 different clues across 3 published puzzles, most often “Joint seal” — The New York Times, Sunday, 27 December 2009.

6 letters

Every clue on record, most used first

Joint sealonce
The New York Times — Sunday, 27 December 2009
Engineering ringonce
The New York Times — Friday, 7 October 2005
Rubber ringonce
The New York Times — Sunday, 3 August 1997