579A Telescoping Gage 52610

579 Telescoping Gages and Sets, Self-Centering with Two Telescoping Arms
Telescoping Gage, 5/16-1/2"/8-13mm Range, 2-3/8"/60mm Handle Length

The Starrett 579 Telescoping Gage is used for determining the true size of holes, slots, and recesses up to 6" (150mm). The ends of both contacts are hardened and ground to a radius to allow proper clearance on the smallest hole the gage will enter. The tool must be slightly rocked-¥ in the hole being measured to ensure that the tool is on the proper diameter before it is locked and withdrawn. The final hole size is obtained by measuring over the gage contacts with a micrometer. 5/16-1/2"-¥ (8-13mm) Range, 2 3/8"-¥ (60mm) Handle.

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  • Precision Ground Radius on each gage provides two-point contact for maximum accuracy
  • Greater range
  • Constant spring tension gives uniform contact pressure
  • Both plungers are easily locked at any desired setting
  • Handles can be individually ordered. Handles longer than 12" (300mm) are available on special order.
  • Handles are rigidly attached to the contact plungers and are automatically self-centering
  • Ends of both contacts are hardened and ground to a radius to allow proper clearance on the smallest hole the gage will enter
  • Two telescoping contacts


  • Made in America: Yes
  • Range (in): 5/16-1/2"
  • Range (mm): 8-13mm
  • Handle Length (in): 2-3/8"
  • Handle Length (mm): 60mm


    Catalog 33 - Section 15 - Hole Gages, Slot Gages

    We offer several varieties of small hole gage sets as well as telescoping gages for larger holes. Our taper gages are inserted into a hole or slot, with the diameter determined by the reading on the tool's etched scale.

    Precision Hand Tools (Catalog 33)

    612 page catalog featuring precision hand tool, force measurement, vison systems, optical comparators, laser measurement, and flat stock.

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      Member of Kit
      Item #DescriptionPart No.QtyInformation
      1SPR, .073X.125X.18808772-01
      2BEAM EXT,5/16-1/208778-01
      3BODY #579A-B-C08770-01
      4BEAM #579A08777-01
      5PIN, LOCK09013-0/08771-0*1
      6BOLT, LOCK #579B08781-01
      7HOUSING, BEAM08776-01
      8SPRING, .031X.047X.516X.008X2508779-01

    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