831A Small Hole Gage 53083

831 Small Hole Gages and Sets
Small Hole Gage .125-.200"/3.2-5.1mm Range, 2 13/16"/70mm Length

The Starrett 831 Small Hole Gage is exactly the same as the 829 Series except that the gaging surface is a half-ball with a flat bottom. This permits use in even the most shallow holes, slots, and recesses. .125-.200" (3.2-5.1mm) Range, 2 13/16" (70mm) Length recesses.

3D CAD Files / Exploded Parts Diagram
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  • Ideal for accurately measuring small holes, slots, grooves, and recesses
  • Precision Ground Radius on each gage provides two-point contact for maximum accuracy
  • Used for general work
  • Permits use in shallow holes, slots, and recesses
  • Well balanced
  • More accurate measurements
  • Hardened-ball measuring surface with two-point contact
  • Half-ball with a flat bottom
  • Smooth, sensitive adjustment
  • Adjustment of the gage beyond their range is restricted by a safety stop that prevents breakage


  • Made in America: Yes
  • Range (in): .125-.200"
  • Range (mm): 3.2-5.1mm
  • Length (in): 2-13/16"
  • Length (mm): 70mm

3D CAD Files / Exploded Parts Diagram

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Product Testimonials

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      Member of Kit
      Item #DescriptionPart No.QtyInformation
      10BALL END #831A08865-01
      20ROD, ADJUSTING08876-01
      30NUT,.052-80 ADJ ROD18288-01
      40RING, RETAINING.102X.148X.02118291-01

    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