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The Brown & Sharpe TESA interchangeable thread inserts for TESA AC series micrometers are an accessory for use with the Brown & Sharpe TESA Micromaster AC or Isomaster AC micrometer. The V-anvil and conical spindle tip pair have a 60-degree flank angle and are sized in inch units for measuring the pitch diameter of screw threads conforming to the Unified Inch Standard, including UN, UNC, and UNF series. The thread inserts are made of hardened steel for durability.
Micrometers are precision measuring instruments that use a calibrated screw to measure small distances. These measurements are translated into large rotations of the screw that are then able to be read from a scale or a dial. Micrometers are typically used in manufacturing, machining, and mechanical engineering. There are three types of micrometer: outside, inside, and depth. Outside micrometers may also be called micrometer calipers, and are used to measure the length, width, or outside diameter of an object. Inside micrometers are typically used to measure interior diameter, as in a hole. Depth micrometers measure the height, or depth, of any shape that has a step, groove, or slot. Micrometer heads are for mounting in fixtures, where they are typically used for measurement, or as stops or feeds.
Brown & Sharpe manufactures precision measuring equipment and metrology hand tools. The company, founded in 1833, played a key role in setting industrial standards in the United States. Brown & Sharpe was acquired by Hexagon Metrology in 2001, and is headquartered in North Kingstown, RI.
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