210AP Screw Thread Comparator Micrometer 50731

The Starrett 210 micrometer is ideal for quick comparisons of thread accuracy in screw cutting operations, measuring in small grooves or recesses where regular micrometers cannot be used, and for many other applications. NOTE: Does not measure pitch diameter. For such measurements, Starrett 575 or 585 are recommended. 0-7/8" Range, .001" Grad, Plain recommended.

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  • Has 60 Deg conical anvil, spindle faces with 1/64" (0.4mm) flats on the ends of the points
  • Extremely hard and stable one-piece spindle
  • Advanced sleeve design with staggered lines and distinct figures for precise, easy readability
  • Balanced frame design for comfortable, accurate measuring
  • No glare Starrett satin chrome finish
  • Rigid steel frame
  • Tapered frame for narrow slots and tight places
  • Quick and easy adjustment


  • Micrometer Type: Screw Thread Comparator Micrometer
  • Range (in): 0-7/8"
  • Graduations (in): .001"
  • Anvil/Spindle Material: Steel
  • Anvil Type: Pointed
  • Spindle Type: Pointed
  • Case Type: Plastic


  • 3206 (68917)
    3206 Outside Micrometer Stand


    Member of Kit
    Item #DescriptionPart No.QtyInformation
    2NUT, .375-52PT164141
    3SCREW, .157-40 SLOT X .377 LONGPT051361
    4NAMEPLATE #21024533-01
    5SHELL, OUTSIDE09993-01
    7WRENCH #3PT015261
    8SPRING, BARREL10058-01
    11SPINDLE, ENGLISH05907-01


    2D Dimensional Drawing (PDF)



    105.91 kb
    Catalog 33 - Section 1 - Micrometers

    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.

    Precision Hand Tools (Catalog 33)

    612 page catalog featuring precision hand tool, force measurement, vison systems, optical comparators, laser measurement, and flat stock.