The difference between bolts and screws

Update:06-07-2018
Summary:

1. Bolt: A type of fastener consisting of a head and a […]

1. Bolt: A type of fastener consisting of a head and a screw (a cylinder with an external thread). It must be matched with a nut to fasten and connect two parts with through holes. This type of connection is called bolt connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the bolt connection is detachable.
2. Screw: It is also a kind of fastener consisting of two parts, head and screw. It can be divided into three types according to the purpose—machine screw, set screw and special purpose screw. The machine screw is mainly used for a part with an internally threaded hole and a tight connection with a part with a through hole. No need for a nut fit (this type of connection is called a screw connection and is also a detachable connection; also It can be used with a nut for the fastening connection between two parts with through holes. The set screw is mainly used to fix the relative position between the two parts. The special purpose screw has a lifting eye screw for lifting parts.Socket head cap screws

The place of use of bolts and screws is different. The accuracy of bolts is not high. Unless there is a requirement for fitting, the bolts are easy to disassemble, the machining precision is low, and it is not restricted by the joint material. It is widely used and requires bolts to withstand the lateral direction. Load. The screws are structurally compact, but they cannot be removed frequently and cannot withstand large forces.

Structurally: bolts have a variety of "heads"; studs have no "head"; screws also have a variety of "heads", but the "head" structure is different, the "head" of the screw is generally fastened For the groove, hexagon socket, etc., the screw that can be tightened by hand will be embossed on the "head". This makes the screw size smaller. Application: Bolts are generally used in pairs with nuts. They are used for through holes. They are easily replaced after damage. Studs are also generally used with nuts. They are mostly used for blind holes, and the connectors need to be removed frequently. Screws are also used for blind holes. When it is removed by the connecting piece Heng Shao.