MITUTOYO 611858-521 516 INDIVIDUAL METRIC GAGE BLOCK, RECTANGULAR SHAPE, 131.4 MM L, STEEL Precision gage blocks are the primary standards vital to dimensional quality control in the manufacture of parts Mitutoyo offers a complete selection of gage blocks available in a choice of rectangular or square, metric or inch and steel or CERA (ceramic) types If using only one length repeatedly, it is good practice to purchase discrete gage blocks Each gage block is supplied with a certificate of inspection Provided with inspection certificate These higher accuracy gages are intended for use within a controlled environment by skilled inspection staff Mainly used as reference standards for setting high-precision measuring equipment and for the calibration of lower grade gage blocks rade 00 gage block supplied with a Mitutoyo certificate of inspection that the block meets American Society of Mechanical Engineers (ASME) B89.1.9-2002 standard for flatness, length, parallelism, and surface finish High-carbon, high-chrome steel provides high hardness and wear-resistance Rectangular base for accurate wringing Nominal length in metric [millimeter (mm)] units indicated with laser-etched, black characters Identification number etched in block for traceability