449MAZ-75R Micrometer Depth Gage with Non-Rotating Blade 56636

The Starrett 449, 449M Series Micrometer Depth Gage with Non-Rotating Blade includes a .045" thick x 1/8" wide (1.2 x 3.2mm) blade that can be turned with the fingers and positioned at any angle relative to the base. In operation, the blade does not turn, but moves perpendicularly only, permitting depth measurement of narrow shoulders without the blade rolling off. This is also ideal for slots and recesses as narrow as .045" (1.2mm). Furnished with a 2-1/2" (63mm) or a 4" (100mm) base. 0-75mm Range, 0.01mm Grad, 63.5mm Base, 3 Rods, in Case.

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  • The depths of holes, slots, shoulders and projections can be measured with these fine tools
  • Non-rotating blade: blade does not turn, but moves perpendicularly only
  • 2-1/2" (63mm) base
  • .045" thick x 1/8" wide (1.2 x 3.2mm) blade
  • Combination ratchet and speeder for uniform pressure and quicker adjustment
  • Ring-type knurled lock nut for quick and sure locking


  • Micrometer Type: Mechanical
  • Range (mm): 0-75mm
  • Graduations (mm): 0.01mm
  • Base Length (mm): 63.5mm
  • Lock Nut Type: Plain
  • Measuring Rods (qty): 3
  • Rod Diameter (mm): 1.2x3.2mm
  • Thimble Type: Ratchet
  • Case Type: Padded Case
  • Accuracy (mm): Mic head +/-.0025mm; Rods +/-.005mm


    Member of Kit
    Item #DescriptionPart No.QtyInformation
    1BASE #449M-2 1/2NOT AVAILABLE1
    2SHELL, MIC. METRIC13034-M1
    3CAP, SHELLPT080261
    4SPINDLE, SCREW19964-01
    5NUT, .375-52PT164141
    7SPRING, BARREL10058-01
    9•SCREW, #4-40 SET X .188 LONG19769-01
    10•NUT ASSEMBLY19771-01
    11••NUT,#2-64 RATCH BODY19767-01
    12••PIN, RATCHET .066D X .156LPT189761
    13••CAP ASSEMBLYPT994451
    14••SPRING, .041X.061X.188X.010X 6PT076731
    15••SCREW, #2-64 SLOT X .204 LONGPT197721
    160-25MM ROD ASSEMBLYPT993061100.01mm LNG
    1725-50MM ROD ASSEMBLYPT993071125.41mm LNG
    1850-75MM ROD ASSEMBLYPT993081150.02mm LNG
    19WRENCH #3PT015261


    2D Dimensional Drawing (PDF)



    36.47 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