指旋螺钉

The thumb screw is mainly made of low carbon steel and medium carbon steel. It is extruded by a cold heading machine, and then processed with a die plate. Finally, one end of the screw is flattened by a punch
The surface treatment is mainly environment-friendly zinc plating. The product is mainly used for easily disassembled items or tools. It can be screwed on with bare hands without the help of a wrench. The strength requirement of this product is not very high, but the surface needs to be smooth and clean to avoid hand injury by burrs
Grades: 4/6/8
Size: from M3 to M16