Stainless Steel Screw

There are many types of screws, whether they are micro screws for glasses or large screws for large-scale heavy and electric engineering. The main purpose is to make high industrial products form a fixed whole. If the teeth can not be closed in use, the screw head will be broken if it is locked too hard, or the tooth lines can not be locked tightly, it is a problem of quality accuracy. Screws are "quantity products", not hand-made works of art. In mass production, they aim to achieve high-precision, stable quality and popular price for consumers. The accuracy of screws is usually 6G, and the rough screw used in construction projects is 8g.

The main categories include ordinary screws, self tapping screws and expansion screws.