A resin flush-mounted plug (11) for insertion into an internally threaded hole (1) with a countersink (2) formed in a pallet of a machine tool has a head (12) for filling the countersink (2) of the threaded hole (1) and a pair of legs (13) formed integrally with the head (12) for fitting into an internally...http://www.google.de/patents/US5829936?utm_source=gb-gplus-sharePatent US5829936 - Flush-mounted plug for filling a threaded hole
