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The Starrett Telescoping Gage Set is used for determining the true size of holes, slots and recesses up to 6"/150 mm. The ends of both contacts are hardened and ground to a radius to allow proper clearance on the smallest hole the gage will enter. These tools must slightly "rocked" in the hole being measured to ensure that the tool is on the proper diameter before it is locked and withdrawn. Handles are rigidly attached to the contact plungers and are automatically self-centering. The final hole size is obtained by measuring over the gage contacts with a micrometer. This Telescoping Gage Set, model S579HZ contains 6 gages and has a measuring range of 5/16 to 6" / 13 to 150 mm with 2-3/8 to 3-1/4"/ 60 to 82 mm Handles.
- Range: 5/16 to 6" / 13 to150mm
- Type: Telescoping gage set
Features: Set of 6 Gages in Case., 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