These button dies and die nuts have a 60° angle of thread. 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 millimeters). Manufactured from HSS this general purpose button die is designed for use in medium tensile materials .
