Chrome Alloy Metric Fine 2" Button Die

BORDO 

METRIC COARSE & FINE

Angle of thread is 60 degrees. The crest is flat and the thread has clearance at the root allowing external thread and internal thread to engage well. Larger root radius and lower thread height enable easy screw thread processing and increase thread screw strength. The major diameter of external thread and pitch are specified by a simple numerical value (most commonly measured in milimetres.)