C391 Center Gage

C391,392,C396,C398M Center Gages and Attachments
Steel Center Gage, 60 Deg Range, American Unified National Standard

The Starrett C391 Center Gage features inch graduations, meets the American Unified National Standard and US 60 degree standards. American unified National Standard, 60 Deg.

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  • Extremely handy for use in grinding and setting screw cutting tools
  • American National or U.S. 60 Deg standards
  • Very useful for finding number of threads per inch through graduations in 14ths, 20ths, 24ths and 32nds of an inch.
  • Gage also has a table of double depths of threads for determining size of tap drills.
  • Made of spring-tempered steel with satin chrome finish.
  • Ground gaging surfaces


  • Made in America: Yes
  • Range (Deg): American Unified National Standard, 60º
  • Material: Steel

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