A thread pitch cylinder gage for an internally threaded bore in a workpiece, according to one embodiment, includes a gage post having a bearing surface extending through an externally threaded sleeve. The sleeve is trapped on the bearing surface by a retaining cap at the end of the gage post. A finger...http://www.google.es/patents/US5377417?utm_source=gb-gplus-sharePatente US5377417 - Thread pitch cylinder gage
