Introduce The Daily Life Of Screws

The norm in life is that there are no screws and nuts. Screws are commonly known as screws, and those with external threads can be called "screws". The shape of the nut is generally hexagonal, and the inner hole is an inner thread, which is used to cooperate with the bolt and tighten the related parts. The nut is a common name, and the specification should be called "nut". The head of the bolt is generally hexagonal, and the shank has external threads. The screw is small, with flat head, cross head, and external thread on the shank. Stud practice should be called "double-ended stud", both ends have external threads, and the middle is generally a polished rod. The long end of the thread is used to connect with the deep hole, and the short end is connected to the nut.

Hexagon head bolts are the most commonly used, and are classified into A, B, C and other product grades according to production accuracy and product quality. Grade A and B are the most used, and are mainly used for important, high assembly accuracy and those subject to greater impact, vibration or variable load local. Hexagon head bolts can be divided into two types: hexagonal head and large hexagonal head according to the size of the head support area and the size of the installation orientation; the head or screw has a type with holes for use when locking is required. The square head of the square head bolt has a large size and a stressed surface, which is convenient for the wrench mouth to be stuck or leaning against other parts to start and stop the rotation. Loosely adjust the orientation in the groove.