642Z Top Reading Dial Depth Gage

642,642M Back-Plunger Dial Depth Gages
Top Reading Dial Depth Gage, 0-8.6" Range, 0-100 Dial, .001" Graduations

The Starrett 642 Top Reading Dial Depth Gage uses the back-plunger indicator to provide an upward-facing dial for easier readout. The operator selects the extension and contact point required, zeros the tool on a master and then reads any deviation of the work directly on the dial. .001" Grad, 2 1/2" Base with Extensions and Case.

Contact Starrett


  • Indicator does not have to be repositioned to get the full range available
  • 2-1/2" (60mm) base
  • Two contacts and five extensions extend the range to 8.6" or 215mm
  • Charts are supplied showing combinations of contacts and extensions required to achieve certain lengths
  • Case is included


  • Made in America: Yes
  • Range (in): 0-8.6"
  • Graduations (in): .001"
  • Dial Reading: 0-100


    2D Dimensional Drawing (PDF)



    45.80 kb

3D CAD Files / Exploded Parts Diagram

    Login to see related product files. Or create an account.

Product Testimonials

    Write a product review


    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