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  1. CNC PRGRMR 1990

    THREADED HOLE WITH COUNTERBORE CALLOUT

    I don't see a dwg standard on the drawing i thought it was the top surface..... this is a manufacturer of plasma machines..... i thought i remember it being top surface when i was doing aerospace parts...but not sure
  2. CNC PRGRMR 1990

    THREADED HOLE WITH COUNTERBORE CALLOUT

    Good Afternoon I have a question regarding hole callouts for a threaded hole with a counterbore where does the depth of the thread start Is it from the top surface or from the bottom surface of the counterbore Thanks in advance
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