Precise Micrometer Calibration Set - 53-670-002

• 9 Pc. rectangular sets including two optical flats.
• Assists in meeting both Federal specification GGG-C-105c and ISO 9000 requirements.
• Contains one block of each of the following sizes: .0625, .100, .125, .200, .250, .300, .500, 1.000 & 2.000"
• TWO OPTICAL FLATS that vary in size by .0125" which allows checking anvil faces at half rotations of spindle for measuring flatness.
• Supplied with fitted wooden case and certification to NIST on each block.
• Grade 2 blocks within +8, -4.