20 Types of Bolts and their uses

 

1. Hex Bolt

Definition: A hex bolt has a six sided head (hexagonal) and is used with a nut or tapped hole.

 Use: Commonly used in construction, machinery, and automotive applications for fastening wood, metal, or other materials together. They provide strong and durable connections.

2. Carriage Bolt 

Definition: A carriage bolt has a round, smooth head with a square section beneath it to prevent spinning during installation.

 Use: Primarily used in woodworking, such as furniture assembly or deck construction, where a smooth, domed head is preferred for aesthetic or safety reasons.

3. Lag Bolt

Definition: A lag bolt is a heavy duty bolt with a hex head, used for wood applications and has a coarse, sharp thread for strong grip.

 Use: Commonly used in wood framing, decking, and heavy duty applications, such as securing large beams and posts in construction.

4. U-Bolt

Definition: A U-bolt is shaped like the letter "U" with threaded ends on both sides.

 Use: Typically used to secure pipes or tubes to surfaces or to attach round objects to a framework, such as in plumbing, automotive, and marine applications.

 5 Eye Bolt

Definition: An eye bolt has a loop (or "eye") at one end and a threaded shank at the other.

 Use: Commonly used for lifting, towing, or securing cables and ropes in industrial or construction settings. Eye bolts are frequently found in rigging and load lifting applications.

6. J-Bolt 

Definition: A J-bolt has a long shank and is bent into a "J" shape with a threaded section on one end.

 Use: Often used as anchors in concrete or to hang or support structural components such as walls, fences, and machinery.

 7. Anchor Bolt

Definition: Anchor bolts are used to attach objects or structures to concrete, with one end embedded in the concrete.

 Use: Commonly found in construction, used to secure structural elements like steel columns, beams, or light posts to concrete foundations.

 8. Flange Bolt

Definition: A flange bolt has a built in washer (flange) under the head for better load distribution.

 Use: Widely used in automotive and industrial applications where a larger surface area is needed for better pressure distribution without the need for separate washers.

9. Shoulder Bolt

Definition: A shoulder bolt, also known as a stripper bolt, has an unthreaded, cylindrical shoulder between the head and the threaded portion.

 Use: Commonly used in mechanical assemblies, pulleys, and linkages, where components need to pivot or slide, such as in machinery and automotive systems.

 10. Toggle Bolt

Definition: A toggle bolt is a fastener with spring loaded wings that expand behind a hollow wall to distribute weight over a large area.

 Use: Ideal for mounting objects to drywall, plaster, or other hollow walls, such as shelving, light fixtures, and TV mounts.

11. Machine Bolt

Definition: A machine bolt is a fully threaded bolt with a hex or square head used with a nut or in a tapped hole.

 Use: Commonly used in machinery and construction for securing metal parts together, providing precise and strong connections.

12. Square head

Definition: A square head bolt has a four sided (square) head instead of the more common hex shape.

 Use: Typically used in railroad construction, wood applications, or antique restorations, where a traditional, rustic appearance is preferred or where extra grip is needed during tightening.

13. T-Head bolt

Definition: A T--head bolt has a flat, T-shaped head, allowing it to be placed into a slot or channel.

 Use: Commonly used in machine tool setups and construction, particularly in slotted rails or tracks, where the bolt head fits into the track to secure other components.

14. Stud Bolt

Definition: A stud bolt is a threaded rod with no head, typically used with two nuts, one on each end.

 Use: Commonly used in flange connections for piping systems, automotive engines, and machinery, where both ends of the bolt need to be fastened.

15. Elevator Bolt

Definition: An elevator bolt has a large, flat, thin head and is commonly used with a square neck to prevent rotation during installation.

 Use: Primarily used in conveyor systems and grain elevators, where a wide, flat head is needed to hold thin, soft materials securely.

16. Countersank Bolt 

Definition: A countersunk bolt has a flat, conical head designed to sit flush with or below the surface of the material it fastens.

 Use: Commonly used in furniture and metalworking, where a smooth surface is desired without the bolt head sticking out, such as in hinges or door handles.

 17. Round Head bolt.

Definition: A round head bolt has a smooth, rounded head and is typically used with a nut.

 Use: Frequently used in wooden applications and decorative projects, where the smooth, rounded appearance is preferred for aesthetic reasons or where the bolt head needs to be exposed.

 18. Hanger Bolt

Definition: A hanger bolt has wood threads on one end and machine threads on the other.

 Use: Used to secure objects to wood, such as in furniture assembly, hanging signs, or suspending objects from wooden beams.

19. Plow Bolt

Definition: A plow bolt has a flat countersunk head with a square neck to prevent turning, similar to a carriage bolt but designed for heavier duty applications.

 Use: Commonly used in plow blades, heavy machinery, and construction equipment, where the bolt needs to sit flush with the surface to avoid obstruction.

20. Roofing Bolt

Definition: A roofing bolt has a wide, flat head and is usually fully threaded, designed to hold materials like metal sheets.

 Use: Used primarily in roofing applications, where the wide head helps distribute pressure, securing roof panels or metal sheets together. They are also commonly used in furniture assembly for similar reasons.