DIN316 is a butterfly screw, mainly made of low carbon steel and medium carbon steel. The butterfly screw is composed of two parts. The butterfly nut and headless screw are riveted. The surface treatment is mainly environment-friendly zinc plating. The product is mainly used on articles or tools that are easy to disassemble. It can be screwed on 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