ASME B89-1-13 pdf download MICROMETERS 4 MICROMETERS, GENERAL 4.1 Materials The materials used for the component parts of a micrometer shall meet the minimum requirements for hardness, stability, and strength. 4.2 Resolution Micrometers using the inch system shall read to the least count of 0.001 in., 0.0001 in., or 0.00005 in. Micrometers using the metric system shall read to 0.01...