585FP Screw Thread Micrometer 56170

The Starrett 585 micrometers have a pointed spindle and a double V-anvil, both shaped to contact the screw thread as shown in the drawing. The micrometer reading therefore gives the pitch diameter. 1-2” Range, .001” Grad, 28-30 TPI.

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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
  • For measuring American Unified National series and Unified J seriesscrew threads
  • Series 585 micrometers come with a one-inch standard at no extra cost
  • Decimal equivalents on inch tool


  • Micrometer Type: Screw Thread Micrometer, 28-30 TPI
  • Range (in): 1-2" Capacity Pitch Diameter
  • Graduations (in): .001"
  • Anvil/Spindle Material: Steel
  • Anvil Type: Double V-anvil
  • Spindle Type: Pointed spindle


    Member of Kit

    Item #DescriptionPart No.QtyInformation
    2SPRING, BARREL10058-01
    4NUT, .375-52PT164141
    5SCREW, .157-40 SLOT X .377 LONGPT051361
    6SPINDLE, 28-30 PITCH19344-01
    7ANVIL, FIXED19326-01
    8SHELL, 28-30 PITCH19339-01
    9STANDARD, 1"04835-11
    10WRENCH #3PT015261

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    California Proposition 65 Warning

      WARNING: This product contains lead, a chemical known to the State of California to cause birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov