Bolts are a vital component in many construction and DIY projects, as they provide strong and solid connections. Bolts, like screws, are classified into various varieties, each of which is tailored for a certain application. Here’s an overview of some of the most prevalent types of bolts and their applications:
Carriage Bolts
Carriage bolts feature a round head and a square neck that locks into place when used with a square hole in a metal strap. This design allows for installation from one side and is commonly used in wood connections.
Dowel Screws
Dowel screws are double-ended screws with threads on both sides. They are effective in securing two pieces of wood together, making them ideal for furniture assembly and repair.
Elevator Bolts
Elevator bolts have a large, flat head and are designed to secure canvas belts in conveyor systems. They are commonly used in grain elevators and other similar applications.
Hanger Bolts
Hanger bolts have threads at both ends, with one end designed to screw into wood and the other end to accept a nut. They are used to suspend objects from a wooden base.
Hex Cap Screws
Hex cap screws have a hexagonal head and are used in applications requiring tight tolerances, such as original equipment manufacturing.
Hex Flange and Frame Bolts
These bolts are commonly used in vehicle frames and feature a flange under the head that provides a wider bearing surface.
Hex Machine Bolts
Hex machine bolts are used in outdoor applications, such as decks, where a strong and durable connection is needed.
Hex Tap Bolts
Hex tap bolts are similar to hex cap screws but are fully threaded. They are used in machinery applications, such as motor assembly.
Lag Screws
Lag screws, also known as lag bolts, have sharp points and are used primarily in wood surfaces. They provide a strong grip and are often used in heavy-duty applications.
Metric Bolts
Metric bolts are sized differently than US standard bolts and are commonly used in machinery that requires metric specifications.
Plow Bolts
Plow bolts have a countersunk head and a square neck, similar to carriage bolts. They are used in applications where a flat surface is needed, such as in plows and other equipment.
Slotted Flat Head Cap Screws
These screws have a flat countersunk head with a slotted drive, making them suitable for applications requiring a flush surface.
Square Head Machine Bolts
Square head machine bolts are used in similar applications as hex bolts but offer a unique aesthetic and can be tightened with a wrench.
Step Bolts
Step bolts have a smooth, rounded head and are used in wooden decks for a nearly flush finish.
Structural Bolts
Structural bolts are heavy-duty bolts designed for use in construction and infrastructure projects. They are used to connect structural members and are often used with nuts.
Threaded Rods/Studs
Threaded rods, or studs, are long rods that are threaded along their entire length. They are used in tension applications and can be cut to desired lengths.
Each type of bolt serves a specific purpose in construction and DIY projects. Understanding the differences and applications of these bolts can help you choose the right one for your project, ensuring a strong and secure connection.