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Choosing the Right Fastener: Screws, Nuts, Bolts, and Beyond
M.S.M Engg Works
6/16/20243 min read
Introduction
Choosing the right fastener for your project is crucial to ensure structural integrity, durability, and overall success. Fasteners come in various types, each designed for specific applications and materials. This guide will help you navigate the world of screws, nuts, bolts, and other fasteners, providing insights into their uses, materials, and selection criteria.
Understanding Different Types of Fasteners
Fasteners are broadly categorized based on their design and function. Here’s a closer look at the most common types:

SOURCE: Albany County Fasteners
Screws
Screws are among the most essential and versatile fasteners used in countless applications, from simple DIY projects to complex industrial machinery. This guide will take you through everything you need to know about screws, helping you make informed decisions for your projects.
What is a Screw?
A screw is a type of fastener characterized by a helical ridge, known as a thread, that wraps around a cylindrical shaft. Screws convert rotational force into linear motion, allowing them to secure materials together.
Types of Screws
Understanding the various types of screws is crucial for selecting the right one for your needs. Here are some common types:
Wood Screws
Designed for wood applications
Coarse threads to grip wood fibers
Tapered shaft to prevent splitting
Machine Screws
Uniform diameter along the length
Used with nuts or tapped holes in metal or plastic
Available in various head shapes and drive types
Sheet Metal Screw
Used to secure metal sheets together
Sharp threads for cutting into metal
Often self-tapping, eliminating the need for pre-drilling
Self-Tapping Screws
Can create their own thread in materials
Ideal for joining dissimilar materials like metal and plastic
Deck Screws
Designed for outdoor use, often coated for corrosion resistance
Specific thread design for gripping decking material securely
Drywall Screws
Designed for attaching drywall to wood or metal studs
Bugle head to avoid tearing drywall paper














Bolts
Hex Bolts
Six-sided head designed for use with a wrench or socket.
Used in construction and machinery for heavy-duty applications.
Carriage Bolts
Round head with a square section under it to prevent turning once tightened.
Commonly used in wood applications.
Lag Bolts
Large, heavy-duty screws with a hex head.
Used for wood and masonry.
Eye Bolts
Bolts with a looped head for attaching ropes or cables.
Used in rigging and lifting applications.








Nuts
Hex Nuts
Six-sided head designed for use with a wrench or socket.
Used in construction and machinery for heavy-duty applications.
Carriage Bolts
Round head with a square section under it to prevent turning once tightened.
Commonly used in wood applications.
Lag Bolts
Large, heavy-duty screws with a hex head.
Used for wood and masonry.
Eye Bolts
Bolts with a looped head for attaching ropes or cables.
Used in rigging and lifting applications.








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