Screw head for use with cross slot-screwing tool in electrical industry, has connection line curvedly wound between slot edges with radius of preset value, and intersection between two abutting slots curvedly wound with another radius

摘要

The screw head has four slots outwardly running from a center of the head, where slots lie opposite to each other at an angle of 180 degree. Longitudinal sides are designed as slot edges. A deep-region between the slot edges is formed as a slot base. Radial, outer front ends pass into each other in the center of the head. A connection line is curvedly wound between the slot edges with a radius of predetermined value. An intersection between two abutting slots is curvedly wound with another radius of a preset value.