The difference between screws and bolts

Generally speaking, screws do not refer to fasteners, they are generally used for transmission.

Sometimes, "screw" can specifically refer to the threaded part of a bolt or screw.

Nut: A nut is a part of a nut that is screwed together with a bolt or screw to provide a fastening effect.

Screws, also known as fasteners or standard parts, include screws, bolts, and studs.

Stud refers to a type of fastener without a head and only with external threads on both ends, such as double end stud, welding stud, etc. (Sometimes it is called a screw, which I personally think is not appropriate).

The difference between screws and bolts is small and often confused, and there is no particularly clear specification line in reality.

Smaller ones are often called screws.

For example, self drilling screws, tapping screws, and lag screws.

Larger screws are called bolts.

For example: hex machine bolts, expansion bolts, carriage bolts, etc.

However, generally speaking, bolts are used to connect two objects, usually through light holes, and need to be used in conjunction with nuts. They do not serve as a single connection. Tools usually use a wrench. The head is mostly hexagonal and generally larger.

Screws usually do not require nuts and can fit directly with two objects (usually connecting parts need to be drilled and threaded first). Tools usually use screwdrivers (screwdrivers), and the head is mostly a straight groove, cross groove, and there are many inner and outer hexagons, which are generally smaller. Official account "Mechanical Engineering Literature", engineer's gas station!

What is the difference between bolts and screws, and what is the difference between screws and bolts?

1. Bolt:

A type of fastener consisting of a head and a screw (cylindrical body with external threads), which needs to be matched with a nut and used to tighten and connect two parts with through holes. This type of connection is called bolt connection. If the nut is unscrewed from the bolt, it can separate these two parts, so bolt connection is a detachable connection

2. Screw:

It is also a type of fastener composed of a head and a screw, which can be divided into three categories according to its purpose - machine screws, set screws, and special purpose screws.

Machine screws are mainly used for fastening connections between a part with an internal threaded hole and a part with a through hole, without the need for nut fitting (this type of connection is called a screw connection, which is also a detachable connection; it can also be used with a nut for fastening connections between two parts with through holes.

Tightening screws are mainly used to fix the relative position between two parts.

Special purpose screws include lifting ring screws for lifting parts.

The usage places of bolts and screws are different, and bolts do not have high precision requirements unless there are matching requirements. Generally, bolts are easy to disassemble, have low processing accuracy, are not limited by connection materials, and are widely used,