124A Solid -Rod Inside Micrometer Set 50540

The Starrett 124 Solid -Rod Inside Micrometer Sets are the most popular inside micrometers because of their lightness, ease of use, and range. They are very useful for measuring inside diameters of cylinders and rings and measuring parallel surfaces. The desired range is obtained by assembling rods and spacing collars to the micrometer head. Measuring rods are provided with a shoulder that is set accurately in the micrometer head and locked in position. When assembling rods to the A and B heads, the reading line on the micrometer head should be lined up with the marking on each rod (except for the 2-3" and the 50-75mm rods). Rod diameters are approximately 1/4" (6mm) on the A and B sizes, and approximately 11/32" (8.5mm) on the C size. Each rod has individual length adjustment for the anvil by means of special wrenches furnished. 2-8” Range, .001” Grad, 6 Measuring Rods furnished.

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  • Insulated rods marked with length
  • Adjustable for length
  • Measuring rods are solid
  • Hardened and ground anvils
  • Quick-reading figures
  • 6-1/2" (165mm) long handle is available (124H)


  • Micrometer Type: Inside Micrometer Set
  • Range (in): 2-8"
  • Graduations (in): .001"
  • Measuring Rods (qty): 6
  • Spacing Collars: One 1/2"
  • Accuracy (in): Lead accuracy +/-.0001" per inch


    Member of Kit

    Item #DescriptionPart No.QtyInformation
    2•NUT, .375-5217071-01 
    3•BODY,ENGLISH #124A B17073-01 
    4••HANDLE, SHORTPT01546A1 
    5••SCREW, .110-52 LOCK X .186
    6•SHELL, OUTSIDE01535-01 
    7•SPINDLE SCR, .297-4017077-01 
    8•CAP, SHELL01539-01 
    9COLLAR, SMALLPT015791 
    10ROD W/ANVIL 2-3"PT991911 
    11ROD W/ANVIL 3-4"PT991921 
    12ROD W/ANVIL 4-5"PT991931 
    13ROD W/ANVIL 5-6"PT991941 
    14ROD W/ANVIL 6-7"PT991951 
    15ROD W/ANVIL 7-8"PT991961 
    16WRENCH #3PT015261 
    17POINT WRENCH, #124PT191771