Calibration blocks with flat-bottom holes have cylindrical shape, step blocks and parallelepipeds of required height. From the side, opposite to the working surface (bottom), a flat-bottom hole is made with predetermined known parameters.

Requirements to calibration blocks with flat-bottom holes (materials, geometrical dimensions, quality and quantity of holes) are shown a corresponding regulatory and technical documentation.

  Figure1. - " Standard designs of calibration blocks with flat-bottom holes"