Do screws refer to bolts or nuts or collectively?

First of all, these three can be said to be fasteners, nuts and screws can not be grouped together. Let me elaborate.

Studs, bolts and screws are all threaded rod-shaped mechanical parts that play a connecting role. The main difference between stud, bolt and screw is that stud has no T-head and double head is thread. Both bolts and screws have T-heads, and only one end is threaded.

Bolt is a kind of fastener consisting of head and screw (cylinder with external thread), which needs to be matched with nut to firmly connect two parts with through holes. This connection form is called bolt connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the bolt connection is detachable.

Screw is also a kind of fastener composed of head and screw, which can be divided into three types according to the purpose-machine screw, set screw and special screw. Machine screws are mainly used for fastening connection between parts with internal thread holes and parts with through holes, without nut cooperation (this connection form is called screw connection and also belongs to detachable connection; It can also be matched with nuts for fastening connection between two parts with through holes. The set screw is mainly used to fix the relative position between two parts. Special screws include eyebolts for lifting parts.

Bolts and screws are used in different places. Bolts do not require high accuracy unless there is a matching requirement. General bolts are easy to disassemble, have low machining accuracy, are not limited by connecting materials, and are widely used. Bolts that need to be matched can bear lateral loads. The screw is compact in structure, but it can't be disassembled frequently and can't bear large force.

Screws, bolts and screws use different tools.

The screw is the kind that is screwed with a screwdriver.

This kind of bolt is screwed with a hexagon wrench.

Nuts are nuts, which are tightened with bolts or screws.

The screw is a threaded rod.

What we should remember is that screw is actually an informal term. The standard terms are only screws, bolts, nuts and screws. Smaller bolts are called screws, bolts without caps are called screws, and nuts are parts with internal threads connected with screws, bolts and screws.

The basic difference between a bolt and a screw is that the bolt needs to be equipped with a nut, and the screw is directly screwed into the screw hole of the base plate without using the nut.

Provided by Annie from Fasway, I hope I can help you!