General Tools 251 Screw Pitch Gages

These finely crafted measuring devices are used for gaging V, American National or U.S. standard 60° threads

• Gages are notched for measuring inside threads of small holes and nuts as well as external threads
• Set of 51 screw pitches combines all sizes from4 to 84, including 11-1/2 and 27 pipe thread sizes
• Knurled thumb nuts lock the case in an open or closed position