Master setting discs are used to calibrate and set comparators, adjustable snap gages and other precision measuring instruments that are used to inspect parts. Master discs are specified sometimes as setting discs.


  • Class X or Y.
  • GO/NO-GO, Bilateral Tolerances Available.
  • Steel 60/62 Rockwell C.
  • Comes Complete With End Grips.
  • All Disc Masters Are Furnished With Clear Insulators.
  • Color Insulators Are Available On Special Order.
  • Roundness Is Within Half Of Tolerance.
  • Material Steel, Chrome And Carbide.
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