449MBZ-75R Micrometer Depth Gage with Non-Rotating Blade 56638

449, 449M Micrometer Depth Gages with Non-Rotating Blades
Micrometer Depth Gage with Non-Rotating Blade, Ratchet Thimble, 0-75mm Range, 0.01mm

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, 100mm 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
  • 4" (100mm) 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


  • Made in America: Yes
  • Micrometer Type: Mechanical
  • Range (mm): 0-75mm
  • Graduations (mm): 0.01mm
  • Base Length (mm): 100mm
  • 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




    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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      Member of Kit
      Item #DescriptionPart No.QtyInformation
      2SHELL, MIC. METRIC13034-M1
      3CAP, SHELLPT080261
      4SPINDLE, SCREW19964-01
      5NUT, .375-52PT164141
      6SHELL, ADJUSTING09183-M1
      7SPRING, BARREL10058-01
      8RATCHET STOPPT994021
      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
      160-25 MM ROD ASSEMBLYPT993061100.01mm LNG
      1725-50MM ROD ASSEMBLYPT993071125.41mm LNG
      1850-75MM ROD ASSEMBLYPT993081150.02mm LNG
      19WRENCH #3PT015261

    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