121AZ Long Range Tubular Inside Micrometer 50492

121 Long Range Tubular Inside Micrometers
Long Range Tubular Inside Micrometer, 32-57" Range, .001"

Starrett 121 tubular inside micrometers are designed for large internal measurements beyond the capacity of most other micrometers. Each set consists of a micrometer head mounted at the end of a tubular holder in which measuring rods can be inserted and adjusted to the desired size. Final size reading in thousandths of an inch (.001") is obtained using the micrometer head. In case with 1 Graduated Measuring Rod 32"-57".

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  • Consists of a micrometer head mounted at the end of a tubular holder
  • Rods and holder are light in weight
  • Rod anvils are adjustable
  • Quick, easy adjustment
  • Rods and holder are made of rigid, steel tubing
  • Hardened and ground anvils
  • Insulated rod holder
  • Nickel-plated finish
  • Satin-chrome finish on micrometer head reading surfaces
  • Rods are accurately graduated in inches - micrometer head in thousandths of an inch


  • Made in America: Yes
  • Micrometer Type: Long Range Tubular Inside Micrometer
  • Range (in): 32 - 57"
  • Graduations (in): .001"
  • Measuring Rods (qty): With 1 Graduated Measuring Rod
  • Case Type: Wood
  • Accuracy (in): +.0004" / -.0000"




    Catalog 33 - Section 1 - Micrometers
    The L.S. Starrett Company

    In the hands of a skilled operator, the precision micrometer is the most accurate hand-held tool available. When close measurements are necessary, the micrometer is the ideal tool for the job because measurement and reading are on the same axis and the anvil end is supported by a strong frame.

    [69 pages]

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    California Proposition 65 Warning

      WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov