inside micrometer gage
1Micrometer — This article is about the measuring device. For the unit of length, see Micrometre. Outside, inside, and depth micrometers A micrometer (   …
2Ring gauge — A Ring gage or Ring gauge is a cylindrical ring of steel whose inside diameter is finished to gage tolerance and is used for checking the external diameter of a cylindrical object. Ring gages are used for comparative gaging as well as for… …
