coupling nut :

material: stainles steel ,carbon steel and other materials

1.applicable to concrect the role of fixed interconnection with a variety of casing gecko,car repair and all kinds of bolt with screw connection.

2. to improve the strength and efficiency of the products ,using multi- stage cold pier directly molding machines and automatic tapping machine.

3. the shape can be circular and hexagonal different and various special -shaped nut with long teeth