1, What is the Chicago screw?
The male and female screw is a special screw, also known as male female screw, or lock screw, composed of two parts, the screw is the male screw, and the nut is the female screw, need to be used together, mainly used in bags, tables, and chairs, etc., to play a decorative fastening role. 
Because the product is like the Chinese word "Gong", so it is also known as an I-shaped nail, or I-shaped screw, main material is copper, iron, stainless steel, aluminum, and so on, and the surface of the hanging chromium, hanging nickel, rolling chromium, copper embryo, and other processes. 
2, How to use Chicago screw
The Chicago screw is by the male screw and the female screw. In general, before the use of the female screw, to the prophet the diameter of the male screw, the inner hole diameter and the diameter of the female screw is how big, the length of the inner hole, the diameter of the head, and the thickness of the head and other parameters, and then choose or customize the appropriate size of the female screw. Chicago screw is often used for car key bags, accounts, albums, etc., to account for example, when used, in the corner of the account to play a hole, the male screw will through the hole, and then buckle the female screw, screw it tight and secure it.
3, Points for attention about the male and female screw
There are no special requirements for the use of male and female screws, and the use of ordinary screws similar precautions, mainly paying attention to the male screw and female screw are used together, and the same specifications, and should pay attention to the use of the field, the environment to choose the appropriate specifications and materials of Chicago screw.
Suzhou Anzhikou Hardware Technology Co., Ltd. is a screw manufacturer with 20 years of experience. We can customize productions, according to your drawings and samples, and also can provide you with suitable fastener solutions.  If necessary, you are welcome to inquire!