The nut specification table unifies all kinds of nuts in detail, and subdivides some specifications of nuts with the table. There are many kinds of nuts, but also nuts of different materials. Each type of nut has different specifications, and each screw has its own mechanical properties and functions.

The external knurling of embedded copper nuts can be formed in two ways. One is to use copper raw materials to stretch the knurling and then produce it on the equipment. Generally, the stretch pattern of this way is straight, and the other is to use smooth round copper materials to directly tap the teeth while embossing in the production process. This processing method can produce some non-standard knurled copper nuts. The embossing shape of embedded copper nuts can be selected by users, such as reticulate Various knurling patterns such as splayed embossing and herringbone embossing.