576XR Rounded Anvil Micrometer 66441

The Starrett 576 micrometers are extremely useful for measuring the wall thickness of parts such as solid and split bearings, tubing, sleeves, collars, rings, various cylinders, and also measuring from the inside of a hole to an edge 0-1/2" Range, .001" Grad, Ratchet Stop, Carbide Spindle.

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  • No glare Starrett satin chrome finish
  • Advanced sleeve design with staggered lines and distinct figures for precise, easy readability
  • Balanced frame design for comfortable, accurate measuring
  • Tapered frame for narrow slots and tight places
  • Furnished with fixed, non-rotating anvil
  • One-piece frame of drop forged steel
  • Extremely hard and stable one-piece spindle
  • Quick and easy adjustment
  • Design allows 50% to 75% contact with the thread to be measured, insuring contact with the pitch diameter at all times
  • Micro-lapped measuring face


  • Micrometer Type: Micrometer with rounded anvil
  • Range (in): 0-1/2"
  • Graduations (in): .001"
  • Anvil/Spindle Material: Hardended Steel/Carbide
  • Anvil Type: Round
  • Spindle Type: Flat
  • Thimble Type: Ratched


    Member of Kit
    Item #DescriptionPart No.QtyInformation
    10NUT, .312-60 ADJUSTING16906-01
    20ANVIL, #576-1/2PT084221
    40SPINDLE, CARBIDE26353-01
    50SHELL, ADJUSTING16914-01
    60SHELL, OUTSIDE26378-01
    70SPRING, BARREL01641-C1
    90•CAP ASSEMBLYPT994451
    110••CAP, RATCHET07671-B1
    120•BODY, RATCHET #23019773-01
    130•PIN, RATCHET .066D X .156LPT189761
    140•SPRING, .041X.061X.188X.010X6PT076731
    150•SCREW, #2-64 SLOT X .204 LONGPT197721
    160WRENCH #232 1/2PT171841


    2D Dimensional Drawing (PDF)



    57.29 kb



    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