Range/Size: 10-13 TPI
585CP Screw Thread Micrometer: 14-18 TPI
The 585CP has graduations of .001".
The Starrett 585 micrometers have a pointed spindle and a double V-anvil, both shaped to contact the screw thread as shown in the drawing. The micrometer reading therefore gives the pitch diameter. 1-2" Range, .001" Grad, 14-18 TPI.
The 585CP has the Starrett satin chrome finish - no glare - resists rust