Micrometer (device)
DEVICE INCORPORATING A CALIBRATED SCREW
Micrometer screw; Micrometer screw gauge; Micrometer (measuring instrument); Vernier micrometer; Micrometre (caliper); Micrometre (calliper); Micrometre (screw gauge); Micrometre screw gauge; Micrometre screw; Vernier micrometre; Micrometre (measuring instrument)
A micrometer, sometimes known as a micrometer screw gauge, is a device incorporating a calibrated screw widely used for accurate measurement of componentsEncyclopedia Americana (1988) "Micrometer" Encyclopedia Americana 19: 500 (set) in mechanical engineering and machining as well as most mechanical trades, along with other metrological instruments such as dial, vernier, and digital calipers. Micrometers are usually, but not always, in the form of calipers (opposing ends joined by a frame).