The difference between fastener bolts and screws:
1. The definition of fastener bolts and screws are different
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. The 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 fasten objects and parts. The set screw is used to fix the relative position of the machine. 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 heads are mostly flat and cross grooves, and there are many internal and external hexagons, which are generally small.
3. Fastener bolts and screws have different applications
Bolts: Generally used in pairs with nuts, for through holes, easy to replace after damage.
Screw: Normally, no nut is needed, and it is directly matched with two objects (generally, the connecting piece needs to be drilled and tapped), which is mostly used for blind holes, and the connected piece is rarely removed.
4. Fastener bolts and screws use different tools
Bolts generally use wrench-like tools.
Screws generally use screwdriver tools.
5. The fastening of fastener bolts and screws is different
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. For example, the wood screws we call are this kind of screws.
6. The use occasions of fastener bolts and screws are different
The use places of bolts and screws are different. Bolts do not require high precision, unless they are required for cooperation. Generally, bolts are easy to disassemble, have low machining accuracy, are not limited by connecting materials, and 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.