Types of Screws and Bolts

12 Types of Screws and Bolts

Posted on

The type of fixing screw ( Set Screw ) commonly known as the cap screw has a shape similar to a bolt, but this type of screw is full-grained. The difference between a bolt and a screw is that the bolt has a thread that is not complete, in other words the thread does not reach the head of the bolt.

While the screw has a thorough thread until it reaches the screw head. Another difference can also be identified from the bolt and screw heads. In its use, the bolt does not use a screwdriver but a key, while the screw uses a driver,  in the form of a screwdriver .

Here are the types of set screws and their bolts:

1. Fastener Screw (Set Screw)

Fastener Screw (Set Screw)
Fastener Screw (Set Screw) via rs components

This type of screw is the most widely used type. Usually better known by the name of the screw head (cap screw). This type of screw is widely used to join and fasten the two objects.

2. Stud Bolt

Stud Bolt
Stud Bolt via dumore

Stud bolts are headless and have threads from each end. Stud bolts are applied in a number of industries for fitting parts, industrial equipment, flanges and machine tools. These types of bolts are available in various sizes and can be configured as double end or tap end.

3. Round Head Bolt

Round Head Bolt
Round Head Bolt via united fasteners

This type of bolt is very commonly used with a round head. This round head bolt has a portion of the stem that is square in shape to hold the bolt, which can be used to fasten the wooden floor of the truck body or to the metal bumper.

4. Partially Threaded Bolt

Partially Threaded Bolt
Partially Threaded Bolt

A small diameter full hydrated screw fitted with a square or hexagonal nut. The head can be round or “cheese head” and has a groove for a screwdriver.  This Partially Threaded Bolt is used to place lightweight components or small brackets.

5. Gutter Bolt

Gutter Bolt
Gutter Bolt

Full grain and often galvanized with a dome-shaped head and a screwdriver groove. Used with a nut to fasten lightweight materials and sheet metal.

6. Grub Screw

Grub Screw
Grub Screw

A headless screw that may have a groove for a screwdriver or a groove for an Allen Key Wrench . Used when the screw must be attached below the submerged surface.

7. Self Drilling Screw

Self Drilling Screw
Self Drilling Screw

These screws will thread themselves into the thin metal. Usually it is used directly into the sheet metal or a special sheet metal nut is attached to the component. All screw head shapes can be used with self drilling screws.

 8. “U” Bolt

“U” Bolt
“U” Bolt

U bolt is  usually used for the needs of gas / water pipes. U bolts can also hold leaf springs on the vehicle axle, and also on the exhaust system.

9. Split Pin/Cotterpin

Split Pin/Cotterpin
Split Pin/Cotterpin

This pointed steel pin has a flat section on one side and a small threaded section on the small end. Its flat pointed section is used to hold components such as truck king pins in place. Nuts and washers need to be attached to these split pins to avoid movement.

10. Battery Bolt

Battery Bolt
Battery Bolt

A square head bolt, firmly galvanized, which is often used to secure the battery terminals (battery) to the pole (head) of the battery.

11. Taper Lock Stud

Taper Lock Stud
Taper Lock Stud

Uses a special thread to produce a thread whose last few threads are tapered. The stud has threads that are almost as sharp as to create an interference fit when the stud is installed. These studs are used in heavy load applications on moving equipment.

12. Plow Bolt

Plow Bolt
Plow Bolt

Has a tapered head that can fit into embedded screw holes. When installed, the head is immersed in the surface of the component. These bolts are used to mount the blade on dozers and graders that require a ground connection, so that the driven soil can rotate/roll smoothly on the bonded parts.


Related Post


See also  How Geothermal Power Plant Work System
Gravatar Image
Engineering Student of Airlangga University in Indonesia. Love to share knowledge