The Difference Between Bolts and Screws

The difference between bolts and screws

1. Fastener bolts and screws are defined differently

Bolts: Bolts are cylindrical threaded fasteners that are paired with nuts during use. It is mainly used to fasten and connect two parts with through holes. This connection form is called bolt connection.

Screws can also be called screws. A screw is a tool that uses the physics and mathematics principles of the oblique circular rotation of the object and the friction force to cyclically tighten the objects and parts. The set screw is used to fix the relative position of the machine parts. Screw the set screw into the screw hole of the part to be tightened, and press its end against the surface of another part, that is, fix the former part on the latter part.

2. The shape and structure of fastener bolts and screws are different

Bolt: A type of fastener consisting of a head and a screw (cylinder with external thread). The head is mostly hexagonal, which is generally larger.

Screw: A type of fastener composed of two parts, a head and a screw. The head is mostly a slotted or crossed slot, and there are many internal and external hexagons, which are generally small.

3. Fastener bolts and screws are used differently

Bolts: Generally used in pairs with nuts, for through holes, easy to replace after damage.

Screw: Normally, no nut is needed. It is mostly used for blind holes when directly matching with two objects. The connected parts are rarely removed.

4. Fastener bolts and screws use different tools

Bolts generally use wrench-like tools.

Screws generally use screwdriver tools.

5. Fastener bolts and screws are fastened differently

Bolts are generally used in conjunction with nuts or screwed into machined bolt holes.

In addition to the two fastening methods of bolts, there are self-tapping screws, which are directly screwed into a soft workpiece without processing bolt holes.

6. Fastener bolts and screws are used in different occasions

Bolts and screws are used in different places. Bolts do not require high precision. Unless there is a matching requirement, bolts are generally easy to disassemble, have low machining accuracy, and are not limited by connecting materials. They are widely used. Bolts that require matching can withstand transverse directions. Load: The screw is compact in structure, but cannot be disassembled frequently and cannot withstand large forces.