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.

Nuts are parts that closely connect mechanical equipment. Nuts and bolts of the same specification can only be connected together through the inner thread. For example, M4-P0.7 nuts can only be connected with M4-P0.7 series bolts (in nuts, M4 refers to the inner diameter of the nut is about 4mm, and 0.7 refers to the distance between two threads is 0.7mm); American products are the same. For example, 1/4-20 nut can only be matched with 1/4-20 screw (1/4 refers to the inner diameter of the nut is about 0.25 inch, and 20 refers to 20 teeth in each inch).