ASME B89.1.2M pdf download Calibration of GageBlocks by ContactComparison Methods(Through 20 in. and 500 mm) scOPE This Standard covers procedures to establish unifiedpractice in calibration laboratories for measuring gageblocks up to 20 in. (500 mm) in length (size) by contactcomparison methods. it does not cover interferometriccomparison methods. 2OBJECTIVE To establish an American standard for laboratory cal-ibration of gage blocks by...