3908AC Dial Test Indicator with Dovetail Mount 12636

The Starrett 3908 precise, high quality test indicator offers a full complement of standard features. Indicator includes two contact points, two dovetail clamps, swivel post holder, tool post holder, contact wrench and case.

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  • Three dovetail positioning mounts work with most existing test indicator accessories
  • Precision gear-driven design with smooth, jeweled movement
  • Contact point reverses automatically, always maintaining clockwise hand rotation
  • Contacts are frictionally adjustable and replaceable
  • Meets or exceeds ANSI/ASME accuracy specifications
  • High contrast, easy-to-read dials with a white background on inch reading and a yellow background on millimeter reading indicators
  • Narrow body for in reach ability
  • Satin chrome finish for durability


  • Range (in): .008"
  • Graduations (in): .0001"
  • Dial Reading: 0-4-0
  • Attachments: .078" & .156" contact points, 3/8" & 5/32" dovetail clamps, .156" swivel post holder, tool post holder, contact wrench & case
  • Dial Color: White 1-9/16" Diameter


    Member of Kit
    Item #DescriptionPart No.QtyInformation
    1DIAL TEST INDICATOR, 0-4-0, 1-9/16 DIAM.3908A1
    2•2MM BALL X 12.4MM (.488") LONG CONTACT46188-0(2)2
    3•.375"(9.53MM) DIA DOVETAIL LOCK PIN46175-01
    4•.1562"(3.97MM) DIA DOVETAIL LOCK PIN46177-01
    6ENGLISH DOVETAIL CLAMP - 5/32" X 3/8"46192-01
    81MM BALL X 11.9MM(.469") LONG CONTACT46188-11