These finely crafted measuring devices from General are used for gaging V, American National, or U.S. standard 60-degree screw threads. The set of 51 screw pitches combines all sizes from 4 to 84, including 11-1/2 and 27 pipe thread sizes.
Features:
- Gages notched for measuring inside threads of small holes and nuts as well as external threads.
- Knurled thumb nuts lock the case in an open or closed position.
