The difference between screw and bolt

The editor first tells you about the definition of a bolt: a type of fastener consisting of a head and a screw (a cylinder with an external thread), and a nut is installed on it to fasten two through a through hole. part. This type of connection is called a bolted connection.

There are other professional words that are easy to confuse, I will explain them together here:

Screw: usually not used for connecting parts, whether it is transmission power or movement, screw is not a standard part

Bolt: It mainly means that the other end of the bolt is connected to the two relatively thin parts, the washer and the nut, and then the screw cap is tightened to connect the two parts. In addition, the bolt head is basically hexagonal.

Nut: the screw cap, matched with the bolt.

Stud: generally refers to a double-ended stud: it is a cylinder with screws on both sides, without a head, generally used to screw the inside of the part, a turn nut. If one part is thick and the other part is thin, use this.

Screw: There are two kinds of screws. The general screws and bolts are very similar, mostly in the form of heads, with cross grooves\slots\ and so on.

Screw: usually made by screwing directly into the threaded hole on the part. These holes must first be threaded through

Bolts: ordinary hexagon head bolts.

Depending on the connection method, there are ordinary holes and hinge holes. The bolt used for reaming should match the size of the hole and used when bearing lateral forces.

According to the shape of the head, there is a hexagonal head. Round head. Square head, countersunk head, etc. The countersunk head is usually used where the surface is smooth and without protrusions after the connection, because the countersunk head can be screwed into the part. The round head can also be screwed into parts. The tightening force of the square head can be greater, but the size is larger. Hexagonal heads are the most common.

In addition to meeting the needs of locking after installation. There are holes in the head or rod; these holes constitute screws. This bolt will not loosen under vibration.

Some bolts have to be thin without a screw, called narrow-back bolts, which are conducive to variable force connection.

The steel structure of the special high-strength bolt head will be larger. There are also changes in scale. Other special purposes: T-slot bolts. The machine tool fixture has the most special shape, and both sides of the head must have anchor bolts for connecting and fixing the machine to the ground. There are many shapes. U-shaped bolts and so on. There is also a special type of stud for welding. One end has no thread and can be welded to the part, and the other side is directly screwed with a nut.

Qingdao Haorui can make custom-made pins of various materials and specifications in batches of standard and non-standard parts. At the same time, the company also produces a variety of bolts, nuts, rivets and other fasteners that can be used with your products.